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Writing a PCI Host Controller driver requires bringing up the Root Complex
hardware and registering it with the PCI core in a specific sequence. Add
a guide describing these steps to help developers write new drivers.
It covers the Root Complex topology and enumeration, and walks through the
driver flow, including resource setup, Configuration Space accessors,
address translation, interrupt handling, Link training, power management,
shutdown and removal, using standard guidelines/best practices.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20260803-pci-doc-v1-1-2814f8672cad@oss.qualcomm.com
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When dma_request_chan() returns -EPROBE_DEFER, the error path jumps to
disable_pm and calls pm_runtime_disable() even though pm_runtime_enable()
was never called, leaving disable_depth unbalanced and the device
permanently PM-disabled.
Route the defer path through free_dma to skip pm_runtime_disable().
Fixes: 6bfbf4d0aa0c ("spi: img-spfi: Use dma_request_chan() instead dma_request_slave_channel()")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Link: https://patch.msgid.link/20260808-spfi-v1-1-6bc4345be430@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Treat a failure from devm_request_irq() as a probe error instead of
continuing without an IRQ after only reporting a warning.
Return the error through the existing error path to ensure the driver
does not continue with an unsuccessfully requested IRQ.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260807102932.45785-2-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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platform_get_irq_optional() returns a positive IRQ number on success or
a negative error code on failure. For an optional IRQ, -ENXIO indicates
that no IRQ is available, while other errors should be propagated.
Propagate errors such as -EPROBE_DEFER and -EINVAL instead of continuing
probe without the IRQ.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260807102932.45785-1-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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The static DAI template initializes both playback and capture stream
capabilities before dma-names is examined. As a result,
snd_soc_dai_stream_valid() considers both directions valid even when the
device only provides a single DMA channel.
Move the playback and capture capability initialization into
spacemit_i2s_init_dai(), where it is performed only for the stream
directions backed by a corresponding DMA channel. This preserves the
existing capabilities for devices with both "tx" and "rx" DMA channels,
while preventing unsupported stream directions from being advertised.
Initialize rate_min and rate_max together with the other stream
capabilities to preserve the existing rate constraints.
Fixes: fce217449075 ("ASoC: spacemit: add i2s support for K1 SoC")
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260805064348.44283-1-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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scx_bpf_cid_to_cpu(), scx_bpf_cpu_to_cid() and scx_bpf_cid_topo() live in
the scx_kfunc_ids_cid set, but scx_kfunc_context_filter() doesn't check
that set. The filter's first test treats any kfunc outside its known sets
as non-SCX and allows it, so these three kfuncs can be called from any
struct_ops program - e.g. a TCP congestion control program.
Add scx_kfunc_ids_cid to the filter's known sets, matching how in_any and
in_idle are handled.
Fixes: e9b55af47edf ("sched_ext: Add topological CPU IDs (cids)")
Assisted-by: Z.ai:glm-5.2
Signed-off-by: fangqiurong <fangqiurong@kylinos.cn>
Signed-off-by: Tejun Heo <tj@kernel.org>
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vmtest.sh captures the trailing command with command="$@", which flattens
the arguments into a single space-separated string, and then pastes it
into the generated guest init script:
cd /root/bpf
echo ${command}
stdbuf -oL -eL ${command}
That here-doc is unquoted, so the host expands ${command} and the
flattened text lands in the script verbatim. The guest bash then parses
those lines as shell source, re-splitting the text on whitespace and
glob-expanding it against /root/bpf. As a result any command with a glob
or an argument containing spaces is corrupted before it reaches the test
binary. For example:
vmtest.sh -- ./test_progs -a 'verifier_*'
has 'verifier_*' expanded in the guest into the matching object/skeleton
files (verifier_align.bpf.o verifier_align.skel.h ...), so test_progs is
handed a list of filenames instead of the intended name filter and runs no
matching tests.
Quote each argument with printf '%q ' so the command is reproduced
verbatim inside the VM: the escaped text goes through exactly one round
of quote removal when the guest parses the init script, yielding the
original argv with globs and special characters intact. The common case
(e.g. -t <name>) is unaffected.
Only do this when there is a command to quote. printf '%q ' with no
arguments still applies the format once and emits '', which the -s
(debug shell) path would take for a real command and try to run.
Note this makes the trailing command strictly an argv rather than a shell
snippet: passing it pre-quoted as one word, e.g.
vmtest.sh -- "./test_progs -t foo"
no longer works, and neither does embedding guest-side shell syntax such
as ';' or a redirection. 'sh -c ...' still works.
The RV64 recipe in README.rst does depend on the old double parse: it
wraps the denylist in \" so the literal quotes reach the guest, whose
second parse of the init script removes them. Under %q those quotes now
survive into argv, and parse_test_list() strtok_r()s on ',' turns them
into junk filters:
-d ",exceptions," -> ["] [exceptions] ["]
That is harmless for DENYLIST.riscv64 only because its first line is a
comment, so the leading field is empty. A denylist starting with a real
entry would silently lose it - ["*arena*] never matches - so drop the
backslashes and let the host consume the quotes instead.
Fixes: c9709f52386d ("bpf: Helper script for running BPF presubmit tests")
Signed-off-by: Vineet Gupta <vineet.gupta@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20260807204434.1036279-5-vineet.gupta@linux.dev
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The final summary line is asymmetric: the PASSED field reports both the
number of top-level tests and the number of subtests within them, while
the FAILED field reports only top-level tests:
Summary: 640/5750 PASSED, 7760 SKIPPED, 100 FAILED
There is no way to tell whether those 100 failing tests amount to 100
broken subtests or 1000. So count subtests with a non-zero error_cnt
into a new sub_fail_cnt and print it alongside fail_cnt:
Summary: 640/5750 PASSED, 7760 SKIPPED, 100/342 FAILED
^^^^^
This is correct for -j runs, as subtest_states[] is populated both in
sequential and parallel modes.
A test that fails without declaring any subtests contributes 0 to
sub_fail_cnt. That mirrors the existing behaviour of sub_succ_cnt for
tests that pass without subtests, keeping the two numerators
comparable.
Also emit the new count as a "failed_subtest" field in the JSON output,
for parity with the existing "success_subtest".
Note that this changes the trailing field of the summary line from a bare
integer to "A/B", so anything scraping "N FAILED" out of it needs updating.
While here, fix the fail_cnt comment in struct test_env, which claims it
counts "total failed tests + sub-tests".
Signed-off-by: Vineet Gupta <vineet.gupta@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20260807204434.1036279-4-vineet.gupta@linux.dev
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By default test_progs re-prints the aggregated error logs of all failed
tests at the end of the run (when not in verbose mode), starting with
"All error logs:".
With bpf-gcc the current failures and a couple runaway 1M fails cause a
huge print overhead/delay at the end.
Add a subtractive --no-error-summary flag, gated on a new
env.error_summary field which defaults to true, so the default behavior
is unchanged. Passing --no-error-summary suppresses the final
"All error logs:" dump.
Only the human readable output is elided. dump_test_log() also emits the
per-test and per-subtest entries of the --json-summary "results" array,
so it keeps being called (via a new @quiet argument) and the JSON report
is bit for bit what it was before.
Signed-off-by: Vineet Gupta <vineet.gupta@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20260807204434.1036279-3-vineet.gupta@linux.dev
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reject_scalar_store_to_kptr stores a scalar constant to a kptr field:
*(volatile u64 *)&v->unref_ptr = 0xBADC0DE;
Compilers generate one of two encodings for that:
1. Materialize the constant into a register and emit BPF_STX:
r1 = 0xbadc0de
*(u64 *)(r0 + 0x8) = r1
2. Or fold it into a single BPF_ST (store immediate):
*(u64 *)(r0 + 0x8) = 0xbadc0de
These go through different rejection paths and output different
messages.
- BPF_STX goes through map_kptr_match_type(), which prints
"invalid kptr access, R...".
- BPF_ST only gets the immediate check printing
"BPF_ST imm must be 0 when storing to kptr"
The test only expects the BPF_STX message, so it fails on a toolchain
that folds the constant - bpf-gcc, and clang -mcpu=v4:
7: (7a) *(u64 *)(r0 +8) = 195936478
BPF_ST imm must be 0 when storing to kptr at off=8
...
EXPECTED SUBSTR: 'invalid kptr access, R'
Pick the expected message with __BPF_FEATURE_ST, which clang and bpf-gcc
both define exactly when BPF_ST codegen is available - cpuv4 for clang,
and by default for bpf-gcc, whose default cpu is v4.
bpf-gcc, before: #229/20 map_kptr/reject_scalar_store_to_kptr:FAIL
bpf-gcc, after : #229/20 map_kptr/reject_scalar_store_to_kptr:OK
Two caveats worth noting:
- On a BPF_ST toolchain the test now only exercises the imm != 0 check
and never reaches map_kptr_match_type(), so the scalar-vs-PTR_TO_BTF_ID
rejection the test is named for is only covered by the non-ST builds.
The imm path itself is already covered compiler-independently by
verifier/map_kptr.c ("map_kptr: BPF_ST imm != 0").
- __BPF_FEATURE_ST says the compiler *can* emit BPF_ST, not that it will.
The encoding also depends on the optimization level: clang -mcpu=v4 -O0
still emits BPF_STX, which would send the #ifdef down the wrong branch
and fail the test. Selftests always build BPF objects at -O2 so this
does not bite today, but it is a latent failure mode if that changes.
Signed-off-by: Vineet Gupta <vineet.gupta@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20260807204434.1036279-2-vineet.gupta@linux.dev
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Function gfs2_glock_hold() is expected only to be called when the glock is
held, so use lockref_get_not_zero() instead of lockref_get_not_dead().
In addition, when an asynchronous callback arrives in gfs2_glock_cb(), the
glock can already be dead (from __gfs2_glock_put()), or it can be on the glock
lru list with refcount 0, so we cannot use gfs2_glock_hold() there.
With gfs2_glock_cb() now handling dead glocks, we can remove the racy check in
gdlm_bast().
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
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Mark _##fixture_name##_##test_name##_object __maybe_unused since it may
not ever be read. This pointer is only read in XFAIL_ADD(), which tests
are not required to use.
clang made a change to -Wunused-but-set-variable (split out into its own
subwarning, -Wunused-but-set-global) that causes this warning to be
emitted for various selftests and can be upgraded to an error in
selftest that set -Werror.
VFIO selftests have been broken since commit ff556bd98348 ("vfio:
selftests: Add -Wall and -Werror to the Makefile"), and the net
selftests builds have been noisy due to -Wall.
Fixes: 24cf65a62266 ("selftests/harness: Share _metadata between forked processes")
Reported-by: Kuniyuki Iwashima <kuniyu@google.com>
Reported-by: Aaron Lewis <aaronlewis@google.com>
Reviewed-by: Alex Williamson <alex@shazbot.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20260706183154.2660394-1-dmatlack@google.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
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bui duc phuc <phucduc.bui@gmail.com> says:
This series improves probe error handling in the MXS ASoC drivers.
Use dev_err_probe() where appropriate and remove redundant dev_err() calls
when the corresponding errors are already reported by the called functions
or further down the call chain.
Compile-tested only.
Link: https://patch.msgid.link/20260812101418.37966-1-phucduc.bui@gmail.com
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Remove the probe error messages to avoid duplicate error reporting,
since the error is already reported by the called functions.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260812101418.37966-4-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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The functions called here don't log the error themselves, but the
error is already reported deeper in the call chain, so the dev_err()
calls are redundant and can be removed.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260812101418.37966-3-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Replace dev_err() with dev_err_probe() to prevent log spam when probe
returns -EPROBE_DEFER.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260812101418.37966-2-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add stream_arena_xchg_fault and stream_arena_cmpxchg_fault next to the
existing read, write and load-acquire fault tests, covering the two
places a read-modify-write can deposit the old value: src_reg for a
BPF_XCHG and r0 for a BPF_CMPXCHG. Both cover both halves of the JIT
bug that left the fetch destination alone when a RMW on an arena pointer
faulted:
- the fault has to be reported as a WRITE, and at the address held by
the destination register, which __stderr() and test_address() check
- the register receiving the fetched value has to be cleared by the
fault handler, which the programs check by poisoning it before the
atomic and returning it, so __retval(0) fails if it is left untouched
The __stderr() annotation can only wildcard the faulting address since
the arena base is not known until runtime, hence the two test_address()
subtests on top, which pin it to the address held by dst_reg rather than
src_reg.
Note, the atomics are open coded since linux/filter.h cannot be included
alongside vmlinux.h.
# LDLIBS=-static PKG_CONFIG='pkg-config --static' ./vmtest.sh -- ./test_progs -t stream
[...]
#464/1 stream_arena_fault_address/read_fault:OK
#464/2 stream_arena_fault_address/write_fault:OK
#464/3 stream_arena_fault_address/load_acquire_fault:OK
#464/4 stream_arena_fault_address/xchg_fault:OK
#464/5 stream_arena_fault_address/cmpxchg_fault:OK
#464 stream_arena_fault_address:OK
[...]
#466/5 stream_success/stream_arena_write_fault:OK
#466/6 stream_success/stream_arena_read_fault:OK
#466/7 stream_success/stream_arena_load_acquire_fault:OK
#466/8 stream_success/stream_arena_xchg_fault:OK
#466/9 stream_success/stream_arena_cmpxchg_fault:OK
[...]
Summary: 4/22 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Acked-by: Puranjay Mohan <puranjay@kernel.org>
Link: https://patch.msgid.link/20260811131600.506721-6-daniel@iogearbox.net
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
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Same missing register clear as on riscv64. A RMW atomic on an arena pointer
is converted to BPF_PROBE_ATOMIC and gets an exception table entry, but
bpf_jit_probe_atomic_pre() only fills in the arena base and the probe
offset, leaving probe->reg at the -1 that bpf_jit_probe_init() set, which
bpf_jit_probe_post() writes into the entry and ex_handler_bpf() then reads
back as "there is nothing to clear".
That is right for a plain BPF_{ADD,AND,OR,XOR}, which only writes memory,
but an RMW carrying BPF_FETCH also reads the old value into a register:
src_reg for BPF_{ADD,AND,OR,XOR} | BPF_FETCH and BPF_XCHG, and r0 for
BPF_CMPXCHG. So on a fault over an unmapped arena page the program resumes
at the landing pad with whatever that register held before the atomic
instead of the 0 that every other BPF_PROBE_* access delivers.
Fill probe->reg in from bpf_atomic_load_reg(). Unlike x86-64 and arm64,
s390x does not report arena violations from its exception handler, so there
is no access direction to correct here, only the missing register clear.
Fixes: 2f9469484a3b ("s390/bpf: Support arena atomics")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://patch.msgid.link/20260811131600.506721-5-daniel@iogearbox.net
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
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Same problem as on x86-64: add_exception_handler() folds "there is no
destination register to clear" and "this is a store" into one DONT_CLEAR
value ...
if (BPF_CLASS(insn->code) != BPF_LDX && !bpf_atomic_is_load_acq(insn))
dst_reg = DONT_CLEAR;
... which ex_handler_bpf() then reads back as the access direction:
bool is_write = (dst_reg == DONT_CLEAR);
A RMW carrying BPF_FETCH is both. emit_lse_atomic() reads the old value
into src_reg for BPF_{ADD,AND,OR,XOR} | BPF_FETCH and BPF_XCHG, and into
r0 for BPF_CMPXCHG, so a fault over an unmapped arena page is correctly
reported as a WRITE but leaves that register holding a stale value instead
of the 0 that every other BPF_PROBE_* access delivers. Same as on x86-64,
add a separate ARENA_WRITE bit for the direction.
FIXUP_REG is now filled in by the callers of add_exception_handler(), the
BPF_PROBE_ATOMIC one deriving it from bpf_atomic_load_reg(), so that the
helper only has to determine the direction. This is how the riscv64 JIT
already does it, and it stops the two store callers from handing in a
dst_reg that was only going to be overwritten with DONT_CLEAR anyway.
Fixes: e612b5c1d3ee ("bpf, arm64: Add support for lse atomics in bpf_arena")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Puranjay Mohan <puranjay@kernel.org>
Link: https://patch.msgid.link/20260811131600.506721-4-daniel@iogearbox.net
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
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populate_extable() encodes "there is no destination register to clear" as
DONT_CLEAR in the DST_REG field of the exception table metadata, and later
ex_handler_bpf() then reuses that very value to derive the direction it
reports the fault with is_write = (reg == DONT_CLEAR). The two coincide
for a plain load or store, but not for a RMW carrying BPF_FETCH. Such an
atomic writes memory, so it has to be reported as a WRITE, and it also reads
the old value into a register, src_reg for BPF_ADD | BPF_FETCH and BPF_XCHG,
r0 for BPF_CMPXCHG, so that register has to be cleared on fault. A single
DONT_CLEAR cannot say both, and the store branch picks it unconditionally:
[...]
} else {
arena_reg = reg2pt_regs[dst_reg];
fixup_reg = DONT_CLEAR;
}
[...]
The reported direction is therefore right, but on a fault over an unmapped
arena page the fetch destination keeps whatever it held before the atomic,
where every other BPF_PROBE_* access delivers 0. Give the metadata its own
ARENA_WRITE bit so that the reported direction no longer depends on whether
there is a register to clear, and fill DST_REG in from bpf_atomic_load_reg().
BPF_{AND,OR,XOR} | BPF_FETCH need no handling here, bpf_jit_supports_insn()
already rejects those in the arena.
Fixes: d503a04f8bc0 ("bpf: Add support for certain atomics in bpf_arena to x86 JIT")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Puranjay Mohan <puranjay@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260811131600.506721-3-daniel@iogearbox.net
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
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A RMW atomic on an arena pointer is converted to BPF_PROBE_ATOMIC and
gets an exception table entry, but that entry records no destination
register to clear unless the instruction is a load-acquire today. That
is right for a plain BPF_{ADD,AND,OR,XOR}, which only writes memory,
but an RMW carrying BPF_FETCH also reads the old value into a register:
src_reg for BPF_{ADD,AND,OR,XOR} | BPF_FETCH and BPF_XCHG, and r0 for
BPF_CMPXCHG. emit_atomic_rmw() emits it that way, e.g.:
[...]
case BPF_XCHG:
ctx->ex_insn_off = ctx->ninsns;
emit(is64 ? rv_amoswap_d(rs, rs, rd, 1, 1) :
rv_amoswap_w(rs, rs, rd, 1, 1), ctx);
[...]
Thus, a fault over an unmapped arena page ex_handler_bpf() jumps over
the access but leaves rs untouched, and the program resumes with
whatever it held before the atomic instead of the 0 that every other
BPF_PROBE_* access delivers. Fill the exception table entry in from
bpf_atomic_load_reg(), which returns the BPF register an atomic reads
the memory operand into or -1 when it has none. A load-acquire ends up
with the same register it gets today, it just goes through the helper.
Unlike x86-64 and arm64, riscv64 does not report arena violations from
its exception handler, so there is no access direction to correct here,
only the missing register clear.
Fixes: fb7cefabae81 ("riscv, bpf: Add support arena atomics for RV64")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Pu Lehui <pulehui@huawei.com>
Link: https://patch.msgid.link/20260811131600.506721-2-daniel@iogearbox.net
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
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check_atomic_rmw() open codes the mapping from a BPF_ATOMIC to the register
it reads the old value into, the BPF_STX case of insn_def_regno() open codes
the very same mapping a second time, the const folding and the liveness
transfer functions a third and a fourth time, and BPF JITs need it as well
to know which register a faulting BPF_PROBE_ATOMIC has to clear.
Add a small helper so that all of them can share it. No functional change.
The BPF_LOAD_ACQ case is there for the JITs, which do walk all instruction
classes. const_reg_xfer() loses its explicit BPF_ATOMIC mode test since the
helper checks class and mode itself; the BPF_PROBE_ATOMIC it additionally
accepts cannot be seen there as it is only set from bpf_do_misc_fixups(),
that is, after const folding has run. arg_track_xfer() keeps its mode test
since that also guards the stack clearing next to it.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20260811131600.506721-1-daniel@iogearbox.net
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
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devm_platform_ioremap_resource() does not report the error itself,
but the error is already reported deeper in the call chain,
so the dev_err() calls are redundant and can be removed.
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Link: https://patch.msgid.link/20260812084311.29188-1-phucduc.bui@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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wq_node_nr_active() warns and returns NULL when @wq is not unbound, but
every caller dereferences the result right away, so the WARN_ON_ONCE()
only moves the oops one frame up, as raised by Tejun.
Fix it by BUGing_ON() instead of this silly WARN_ON_ONCE();
Fixes: b72fdc651056 ("workqueue: account nr_active by the backing pool")
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
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regmap_sdw_mbq_poll_busy() decides whether to poll the Function Busy bit
by calling ctx->readable_reg(), which is a straight copy of
config->readable_reg. That callback is optional: regmap_readable() treats
a NULL ->readable_reg as "every register is readable", and drivers rely on
that. es9356 and tac5xx2-sdw both build an MBQ regmap without one.
Since commit ca1b11b36d82 ("regmap: sdw-mbq: Allow defers on undeferrable
controls") the poll runs on every -ENODATA, not only for Controls the
driver marked deferrable, so any of those devices answering
COMMAND_IGNORED takes the kernel through a NULL function pointer.
Treat a missing callback the way the rest of regmap does and poll.
Fixes: 5bc493bf0c37 ("regmap: sdw-mbq: Add support for SDCA deferred controls")
Signed-off-by: Andrey Golovko <andrey.golovko@gmail.com>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://patch.msgid.link/20260811184500.5312-1-andrey.golovko@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Commit 9167f260477b ("ASoC: soc-generic-dmaengine: Handle DMA channel
request failures correctly") started reporting DMA channel request
failures during probe instead of silently ignoring them. This exposed a
bug in the Samsung I2S driver: it always registered a second DAI and its
associated "tx-sec" DMA channel, even for hardware variants that don't
actually support it, such as i2sv7 used on Exynos5433. As a result,
sound card probing on Exynos5433-based boards started failing, whereas
previously it worked only because the channel request failure was
ignored.
Drop the QUIRK_SEC_DAI flag from i2sv7, since this variant does not have
a secondary DAI and register "Secondary Playback" DAPM route only for
variants with such interface.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://patch.msgid.link/20260812074438.3225001-1-m.szyprowski@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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wq->cpu_pwq holds RCU-protected pwq pointers, but the percpu allocation
path fills it in with plain loads and stores, which sparse flags:
kernel/workqueue.c:5682:57: sparse: incorrect type in initializer (different address spaces) @@ expected struct pool_workqueue **pwq_p @@ got struct pool_workqueue [noderef] __rcu ** @@
Allocate the array as __rcu pointers and publish each pwq with
rcu_assign_pointer() once it is initialized and linked, the order
install_unbound_pwq() uses.
The warnings are not new: commit 79f23600bc7b ("workqueue: factor out
get_percpu_pool()") only turned the flagged assignment into an
initializer.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202608120931.tvTzq1gD-lkp@intel.com/
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
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workqueue_congested() fetches the pwq out of wq->cpu_pwq with a plain
load, so sparse complains about the dropped __rcu:
kernel/workqueue.c:6304:13: sparse: incorrect type in assignment (different address spaces) @@ expected struct pool_workqueue *pwq @@ got struct pool_workqueue [noderef] __rcu * @@
A pwq is released with kfree_rcu() and the read is protected by the
surrounding preempt_disable(), which is what
commit fd5081f4ef33 ("workqueue: Remove redundant rcu_read_lock/unlock() in
workqueue_congested()") relied on when it dropped the rcu_read_lock()
here.
Use the rcu_dereference_sched() helper to make that explicit.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202608120931.tvTzq1gD-lkp@intel.com/
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
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FAN53555BUC23X has the ID 0 and REV 0xc, starts at 600mV and
increments in 12.5mV steps.
Per the datasheet, the FAN53555BUC23X (23 option) is grouped with
the 00 and 13 options for soft-start timing (t_SS = 300us typ.),
so the existing enable_time = 400 is reused here as well.
This variant is found on the ASUS Tinker Edge R (RK3399Pro) as the
supply regulator for both vdd_gpu and vdd_cpu_b. Verified across
the full GPU OPP table with the userspace devfreq governor.
Signed-off-by: Arash Golgol <arash.golgol@gmail.com>
Link: https://patch.msgid.link/20260812125054.19111-1-arash.golgol@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Pull to receive:
c10b216a072f ("sched/core: Handle pick_task() releasing the rq lock")
f3629c63a4af ("sched/core: Make core-sched flips wait for in-flight selections")
ffaab58d2175 ("sched_ext: Replace SCX_RQ_BAL_KEEP with a dispatch verdict return")
3dd52416e44a ("sched_ext: Fix this_rq() assumptions in dispatch kfuncs")
f2da9587118d ("sched_ext: Count rq lock releases in rq->scx.lock_drop_seq")
d954004205c1 ("sched_ext: Fix rq->core_pick corruption under core scheduling")
for the pending core scheduling follow-ups and to resolve the conflicts
with the code reorganization and cap gate work on for-7.3.
ffaab58d2175 converts scx_dispatch_sched() to a dispatch verdict return
which for-7.3 moved from ext.c into inlines.h. Resolved by applying the
conversion to the relocated copy and combining balance_one()'s verdict
returns with the scx_task_can_stay_on_cpu() gate from the cap work.
ffaab58d2175 and 3dd52416e44a update scx_bpf_sub_dispatch() which
for-7.3 moved into sub.c. Resolved by applying the scx_locked_rq()
switch and the verdict test to the sub.c copy.
f2da9587118d instruments the open-coded lock releases in
consume_remote_task() which for-7.3 folded into switch_rq_lock().
Resolved by keeping the accounting in switch_rq_lock() which covers all
its callers.
d954004205c1 widens the put_prev_task_scx() WARN suppression to all
core-sched rqs on the same condition that for-7.3 gated with
scx_task_can_stay_on_cpu(). Resolved by combining both.
Signed-off-by: Tejun Heo <tj@kernel.org>
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`_list_tests()` runs the kernel to list tests, strips printk timestamp
lines via `extract_tap_lines()`, then drops the dummy TAP header from
the cleaned `lines`. However the subsequent regex filter mistakenly
operates on the original `output` instead of the cleaned `lines`. When
the kernel output includes timestamp prefixes (common with UML or slower
setups), e.g.:
[ 0.100000] suite.test1
[ 0.100000] suite.test2
the anchored regex `^[^\s.]+\.[^\s.]+$` rejects them and `--list_tests`
returns an empty list.
Filter `lines` instead of `output`, matching the behavior of the
adjacent `_list_tests_attr()` which already returns the cleaned list.
Add a regression test with timestamp-prefixed input to verify the fix.
Link: https://lore.kernel.org/r/20260803190059.36491-1-mohammad.abukhader@hotmail.com
Fixes: 723c8258c8fe ("kunit: tool: Add command line interface to filter and report attributes")
Signed-off-by: Mohammad Abu-Khader <mohammad.abukhader@hotmail.com>
Reviewed-by: David Gow <david@davidgow.net>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
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Register a CPU_PM notifier to restore hypervisor CSR content during CPU
non-retention idle states. When a CPU enters a deep idle state that
powers off the CPU domain, hypervisor CSRs and VS CSRs lose their state
and must be saved before entry and restored after exit.
This completes KVM's power management coverage for RISC-V:
- CPU hotplug: handled by kvm_online_cpu/kvm_offline_cpu (cpuhp callbacks)
- System suspend: handled by kvm_suspend/kvm_resume (syscore ops)
- CPU idle (retention): no action needed, CSRs are retained
- CPU idle (non-retention): handled by this CPU_PM notifier
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260810-kvm-cpu-pm-v5-1-6c9e4c95caf5@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
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Simplify the probe function by using devm_platform_ioremap_resource()
for the base address and devm_platform_get_and_ioremap_resource() for
the SRAM, dropping the manual platform_get_resource() calls.
Assisted-by: opencode:deepseek-v4-flash-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20260811042424.66882-1-rosenp@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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It appears that the bcm2712 SoC found in the relatively popular RPi5 has a
broken EL2 virtual timer.
Tthe reason why the timer isn't working is unknown (the timer is ticking,
but the interrupt never fires), and the SoC vendor doesn't communicate on
the reason why this isn't working, leaving users and maintainers in the
dark.
Paper over the issue by detecting the broken HW, falling back to the
physical timer instead, and let the user know about it. Also taint the
kernel as the machine is definitely not compliant with the spec, and it's
unknown what else is wrong with it.
Reported-by: John <therealgraysky@proton.me>
Reported-by: Daniel Drake <dan@reactivated.net>
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Gary Guo <gary@garyguo.net>
Acked-by: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: Daniel Lezcano <daniel.lezcano@kernel.org>
Link: https://patch.msgid.link/20260710080958.491620-1-maz@kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Two minor core fixes: one for power management issues in error
handling and the other to fix a deadlock in door locking of SCSI
devices with removable media; and a minor bug fix for the debug
driver"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: scsi_debug: Negate wrapped memcmp() result
scsi: core: Do not block on tag allocation in scsi_eh_lock_door()
scsi: core: pair EH runtime PM get and put
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The struct describes a bounce payload of an error code followed by the
original event and its external data. No kernel has ever sent that.
Before commit efc86691e4d8 ("ALSA: seq: Fix kernel heap address leak in
bounce_error_event()") the kernel emitted no SNDRV_SEQ_EVENT_BOUNCE at
all, and since then it sends the event record alone.
Nothing has ever read it either. Its only accessor,
snd_seq_event_bounce_ext_data(), has had no caller for the whole git
history, and it did not even compile until commit c7e0b5bf9fff ("[ALSA]
Remove xxx_t typedefs: Sequencer") incidentally repaired the type name
it referred to, three years after the git import. Drop the accessor
along with the struct.
This removes a definition from a UAPI header. Since no kernel ever
produced the layout, nothing can have parsed it, but a program that
merely names the type will need to stop.
Suggested-by: Takashi Iwai <tiwai@suse.de>
Assisted-by: Claude:claude-opus-5
Signed-off-by: HyeongJun An <sammiee5311@gmail.com>
Link: https://patch.msgid.link/20260812141506.4016387-1-sammiee5311@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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It was an effort to enhance fscache as a kernel cache for lazy
pulling (at least according to previous Incremental FS discussion [1])
and EROFS over fscache was the in-tree user of this mode.
fscache has since evolved to be netfslib-oriented, serving network
filesystem inodes via the netfs library, but EROFS never acts as a
network filesystem and we need to cache golden filesystem images rather
than individual EROFS inodes.
Since EROFS over fscache is now removed, clean up netfs/fscache/
cachefiles upstream too.
[1] https://lore.kernel.org/r/CAOQ4uxi4dzxArY24YO=+kBCK2gGoq3Ptb8WkzCqSogPgU_R3dQ@mail.gmail.com
[dh] Fixed up comments on:
https://sashiko.dev/#/patchset/20260716103030.3065561-1-dhowells%40redhat.com
https://sashiko.dev/#/patchset/20260722130218.78958-1-dhowells%40redhat.com
Signed-off-by: Gao Xiang <xiang@kernel.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/1046393.1786544127@warthog.procyon.org.uk
cc: Paulo Alcantara <pc@manguebit.org>
cc: netfs@lists.linux.dev
cc: linux-erofs@lists.ozlabs.org
cc: bpf@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
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If a valid signature is seen at the default offset, use the default
size/offset for discovery.
Fixes: 01bdc7e219c4 ("drm/amdgpu: New interface to get IP discovery binary v3")
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5447
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 46a0df99a0b2fa2fa61d864b04b6a5d5fe748779)
Cc: stable@vger.kernel.org
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Same change as for h264, avoids overflow later when calculating
min dpb size.
Signed-off-by: David Rosca <david.rosca@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit a4b0720e4f1601f97f59a2be9c1b4b94fa6527d5)
Cc: stable@vger.kernel.org
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The PCIe L1 low‑power settings for NBIF 6.3.1 were never applied due to
unresolved register mapping, which caused the relevant code to be compiled out.
As a result, the PCIe link could not enter L1/L23 power‑down states or transition to L0s.
Properly configure the link control register to enable L1 and L23 power‑down,
and permit L0s link transitions. Keep LTR disabled and let the PCI core enable it
only after verifying end‑to‑end root complex support across switches.
Fixes: 894c6d3522d1 ("drm/amdgpu: Add nbif v6_3_1 ip block support")
Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Kenneth Feng <Kenneth.feng@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit c2417f9fd7049d5a8d87eefd82fd6e36ba1ff7b6)
Cc: stable@vger.kernel.org
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The commit cited by the Fixes tag added separate limited and full-range
BT.2020 YCbCr entries to the DCE output CSC tables, but populated both
entries with the same matrix copied from the common DC table. That
matrix combined full-range scaling with limited-range luma offset and was
incorrect for both limited and full-range output.
Replace the coefficients in both entries in the DCE paths with those from
the new COLOR_SPACE_YCBCR2020_LIMITED_TYPE
and COLOR_SPACE_YCBCR2020_FULL_TYPE entries in the preceding commit
("drm/amd/display: fix BT.2020 YCbCr limited output CSC matrix").
Fixes: 51e6668ab4ba ("drm/amd/display: add missing CSC entries for BT.2020 for DCE IPs")
Assisted-by: OpenAI-Codex:GPT-5.6-Sol
Tested-by: Igor Paunovic <royalnet026@gmail.com>
Tested-by: Satyajit Roy <sroy14@alum.utk.edu>
Signed-off-by: Nathan Lucas <nlucasgit@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 14c8726b79d19934d6eb6d35c612e3f7204af2c6)
Cc: stable@vger.kernel.org
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COLOR_SPACE_YCBCR2020_TYPE, which is selected for
COLOR_SPACE_2020_YCBCR_LIMITED color_space, has coefficients that are
incorrect for limited-range output. Its luma and chroma scaling is
full-range so output is too bright and colors are incorrect.
COLOR_SPACE_YCBCR2020_TYPE is closer to a full-range conversion matrix with
incorrect luma offset, so correct the luma offset for full-range and rename
it to COLOR_SPACE_YCBCR2020_FULL_TYPE.
Add COLOR_SPACE_YCBCR2020_LIMITED_TYPE with correct scaling and range for
limited-range output.
Fix related functions so COLOR_SPACE_YCBCR2020_LIMITED_TYPE and
COLOR_SPACE_YCBCR2020_FULL_TYPE are correctly selected based on
dc_color_space.
Derivation of both matrices follows ITU-T H.273:
Table 4, MatrixCoefficients 9, BT.2020-NCL weights:
KR = 0.2627, KB = 0.0593, KG = 1 - KR - KB = 0.6780.
Equations 45-47 in matrix form:
[ KR KG KB 0 ]
M2020_NCL = [ -KR/(2(1-KB)) -KG/(2(1-KB)) 1/2 0 ]
[ 1/2 -KG/(2(1-KR)) -KB/(2(1-KR)) 0 ]
[ 0 0 0 1 ]
Limited and Full transforms based on equations 30-32 and 36-38 with bit
depth 10, normalized by 1023:
[ 876/1023 0 0 64/1023 ]
MLimited = [ 0 896/1023 0 512/1023 ]
[ 0 0 896/1023 512/1023 ]
[ 0 0 0 1 ]
[ 1023/1023 0 0 0 ]
MFull = [ 0 1023/1023 0 512/1023 ]
[ 0 0 1023/1023 512/1023 ]
[ 0 0 0 1 ]
M2020_NCL_Limited = MLimited x M2020_NCL
M2020_NCL_Full = MFull x M2020_NCL
The upper three rows of M2020_NCL_* are stored in CR, Y, CB order. Each
M2020_NCL_* value is stored as Round(value * 8192) in its 16-bit
two's-complement representation.
Fixes: 973a9c810c78 ("drm/amd/display: Fix COLOR_SPACE_YCBCR2020_TYPE matrix")
Assisted-by: OpenAI-Codex:GPT-5.6-Sol
Tested-by: Igor Paunovic <royalnet026@gmail.com>
Tested-by: Satyajit Roy <sroy14@alum.utk.edu>
Signed-off-by: Nathan Lucas <nlucasgit@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 3b906e1dc7e3c9ff9f7940f6828b367a6a9ec73c)
Cc: stable@vger.kernel.org
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After a recent change VCE now hangs when VCE_CMD_END is emitted
after a pipeline sync without VM flush.
Implement insert_end to correctly insert only one VCE_CMD_END per job.
Fixes: bc639a9eadc7 ("drm/amdgpu: always emit the job vm fence")
Signed-off-by: David Rosca <david.rosca@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 8897ea8c761b856f02061848a7908040a1fe5e68)
Cc: stable@vger.kernel.org
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Use correct size for message buffer = sizeof(struct ruvd_msg).
Add ITSCALING_TABLE_BUFFER size.
Signed-off-by: David Rosca <david.rosca@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 37519d007e4261febbcf35b3045f8344f3145497)
Cc: stable@vger.kernel.org
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This needs to use pitch instead of width. Also reject pitch
over 4096 to avoid overflow.
Signed-off-by: David Rosca <david.rosca@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit b41c8cb12e202b220353332ab87dc01a11f69304)
Cc: stable@vger.kernel.org
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This should use actual number of references from the decode
message, instead of maximum derived from level.
Signed-off-by: David Rosca <david.rosca@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 64b525edb7e7bdfcdc77883c5e413804e2396856)
Cc: stable@vger.kernel.org
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Fixes potential overflow in DPB size calculations.
Signed-off-by: David Rosca <david.rosca@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Reviewed-by: Ruijing Dong <ruijing.dong@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 05e1387d151f71569fbe122d2c89f9db0c21dc10)
Cc: stable@vger.kernel.org
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dGPUs with an internal PCIe switch expose graphics functions below the
switch downstream port. The automatic ASPM check uses the display
endpoint and evaluates the internal link instead of the host link.
Use the switch upstream port for the check and report the selected
link.
Fixes: 0ab5d711ec74 ("drm/amd: Refactor `amdgpu_aspm` to be evaluated per device")
Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 4e0d6f2876e704fff707b18c40dbd383aea4a1c9)
Cc: stable@vger.kernel.org
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radeon_driver_load_kms() calls pm_runtime_use_autosuspend() for PX
devices, but radeon_driver_unload_kms() does not call the matching
pm_runtime_dont_use_autosuspend() during teardown.
If the autosuspend delay is set to a negative value while autosuspend
is enabled, the runtime PM core increments usage_count to prevent
runtime suspend. Without calling pm_runtime_dont_use_autosuspend()
during teardown, this reference is not dropped.
The documentation for pm_runtime_use_autosuspend() also notes that it
is important to undo it with pm_runtime_dont_use_autosuspend() at
driver exit time, unless runtime PM was initially enabled with
devm_pm_runtime_enable().
Add the missing pm_runtime_dont_use_autosuspend() call to the driver
unload path.
This issue was found by manual code inspection.
Fixes: 10ebc0bc0934 ("drm/radeon: add runtime PM support (v2)")
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 0fdc1ff82ea14844c22795e9e0813c3ca03235e1)
Cc: stable@vger.kernel.org
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