linux-stable.git/arch/mips, branch v6.1.2

MIPS: ralink: mt7621: avoid to init common ralink reset controller

2022-12-31T12:33:08+00:00

[ Upstream commit 76ce51798cb16738a4a28a6662e7344aaf7ef769 ]

Commit 38a8553b0a22 ("clk: ralink: make system controller node a reset provider")
make system controller a reset provider for mt7621 ralink SoCs. Ralink init code
also tries to start previous common reset controller which at the end tries to
find device tree node 'ralink,rt2880-reset'. mt7621 device tree file is not
using at all this node anymore. Hence avoid to init this common reset controller
for mt7621 ralink SoCs to avoid 'Failed to find reset controller node' boot
error trace error.

Fixes: 64b2d6ffff86 ("staging: mt7621-dts: align resets with binding documentation")
Signed-off-by: Sergio Paracuellos 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: OCTEON: warn only once if deprecated link status is being used

2022-12-31T12:32:00+00:00

[ Upstream commit 4c587a982603d7e7e751b4925809a1512099a690 ]

Avoid flooding kernel log with warnings.

Fixes: 2c0756d306c2 ("MIPS: OCTEON: warn if deprecated link status is being used")
Signed-off-by: Ladislav Michl 
Reviewed-by: Philippe Mathieu-Daudé 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: BCM63xx: Add check for NULL for clk in clk_enable

2022-12-31T12:32:00+00:00

[ Upstream commit ee9ef11bd2a59c2fefaa0959e5efcdf040d7c654 ]

Check clk for NULL before calling clk_enable_unlocked where clk
is dereferenced. There is such check in other implementations
of clk_enable.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: e7300d04bd08 ("MIPS: BCM63xx: Add support for the Broadcom BCM63xx family of SOCs.")
Signed-off-by: Anastasia Belova 
Reviewed-by: Philippe Mathieu-Daudé 
Acked-by: Florian Fainelli 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: vpe-cmp: fix possible memory leak while module exiting

2022-12-31T12:31:56+00:00

[ Upstream commit c5ed1fe0801f0c66b0fbce2785239a5664629057 ]

dev_set_name() allocates memory for name, it need be freed
when module exiting, call put_device() to give up reference,
so that it can be freed in kobject_cleanup() when the refcount
hit to 0. The vpe_device is static, so remove kfree() from
vpe_device_release().

Fixes: 17a1d523aa58 ("MIPS: APRP: Add VPE loader support for CMP platforms.")
Signed-off-by: Yang Yingliang 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: vpe-mt: fix possible memory leak while module exiting

2022-12-31T12:31:56+00:00

[ Upstream commit 5822e8cc84ee37338ab0bdc3124f6eec04dc232d ]

Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's
bus_id string array"), the name of device is allocated dynamically,
it need be freed when module exiting, call put_device() to give up
reference, so that it can be freed in kobject_cleanup() when the
refcount hit to 0. The vpe_device is static, so remove kfree() from
vpe_device_release().

Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array")
Signed-off-by: Yang Yingliang 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: DTS: CI20: fix reset line polarity of the ethernet controller

2022-12-31T12:31:47+00:00

commit ca637c0ece144ce62ec8ef75dc127bcccd4f442a upstream.

The reset line is called PWRST#, annotated as "active low" in the
binding documentation, and is driven low and then high by the driver to
reset the chip. However in device tree for CI20 board it was incorrectly
marked as "active high". Fix it.

Because (as far as I know) the ci20.dts is always built in the kernel I
elected not to also add a quirk to gpiolib to force the polarity there.

Fixes: db49ca38579d ("net: davicom: dm9000: switch to using gpiod API")
Reported-by: Paul Cercueil 
Signed-off-by: Dmitry Torokhov 
Acked-by: Paul Cercueil 
Signed-off-by: Thomas Bogendoerfer 
Cc: Sudip Mukherjee 
Signed-off-by: Greg Kroah-Hartman

mips: ralink: mt7621: do not use kzalloc too early

2022-12-21T16:48:03+00:00

commit 7c18b64bba3bcad1be94b404f47b94a04b91ce79 upstream.

With CONFIG_SLUB=y, following commit 6edf2576a6cc ("mm/slub: enable
debugging memory wasting of kmalloc") mt7621 failed to boot very early,
without showing any console messages.
This exposed the pre-existing bug of mt7621.c using kzalloc before normal
memory management was available.
Prior to this slub change, there existed the unintended protection against
"kmem_cache *s" being NULL as slab_pre_alloc_hook() happened to
return NULL and bailed out of slab_alloc_node().
This allowed mt7621 prom_soc_init to fail in the soc_dev_init kzalloc,
but continue booting without the SOC_BUS driver device registered.

Console output from a DEBUG_ZBOOT vmlinuz kernel loading,
with mm/slub modified to warn on kmem_cache zero or null:

zimage at:     80B842A0 810B4BC0
Uncompressing Linux at load address 80001000
Copy device tree to address  80B80EE0
Now, booting the kernel...

[    0.000000] Linux version 6.1.0-rc3+ (john@john)
(mipsel-buildroot-linux-gnu-gcc.br_real (Buildroot
2021.11-4428-g6b6741b) 12.2.0, GNU ld (GNU Binutils) 2.39) #73 SMP Wed
     Nov  2 05:10:01 AEST 2022
[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: CPU: 0 PID: 0 at mm/slub.c:3416
kmem_cache_alloc+0x5a4/0x5e8
[    0.000000] Modules linked in:
[    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.1.0-rc3+ #73
[    0.000000] Stack : 810fff78 80084d98 00000000 00000004 00000000
00000000 80889d04 80c90000
[    0.000000]         80920000 807bd328 8089d368 80923bd3 00000000
00000001 80889cb0 00000000
[    0.000000]         00000000 00000000 807bd328 8084bcb1 00000002
00000002 00000001 6d6f4320
[    0.000000]         00000000 80c97d3d 80c97d68 fffffffc 807bd328
00000000 00000000 00000000
[    0.000000]         00000000 a0000000 80910000 8110a0b4 00000000
00000020 80010000 80010000
[    0.000000]         ...
[    0.000000] Call Trace:
[    0.000000] [<80008260>] show_stack+0x28/0xf0
[    0.000000] [<8070c958>] dump_stack_lvl+0x60/0x80
[    0.000000] [<8002e184>] __warn+0xc4/0xf8
[    0.000000] [<8002e210>] warn_slowpath_fmt+0x58/0xa4
[    0.000000] [<801c0fac>] kmem_cache_alloc+0x5a4/0x5e8
[    0.000000] [<8092856c>] prom_soc_init+0x1fc/0x2b4
[    0.000000] [<80928060>] prom_init+0x44/0xf0
[    0.000000] [<80929214>] setup_arch+0x4c/0x6a8
[    0.000000] [<809257e0>] start_kernel+0x88/0x7c0
[    0.000000]
[    0.000000] ---[ end trace 0000000000000000 ]---
[    0.000000] SoC Type: MediaTek MT7621 ver:1 eco:3
[    0.000000] printk: bootconsole [early0] enabled

Allowing soc_device_register to work exposed oops in the mt7621 phy pci,
and pci controller drivers from soc_device_match_attr, due to missing
sentinels in the quirks tables. These were fixed with:
commit 819b885cd886 ("phy: ralink: mt7621-pci: add sentinel to quirks
table")
not yet applied ("PCI: mt7621: add sentinel to quirks table")

Link: https://lore.kernel.org/linux-mm/becf2ac3-2a90-4f3a-96d9-a70f67c66e4a@app.fastmail.com/
Fixes: 71b9b5e0130d ("MIPS: ralink: mt7621: introduce 'soc_device' initialization")
Signed-off-by: John Thomson 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

mips: ralink: mt7621: soc queries and tests as functions

2022-12-21T16:48:03+00:00

commit b4767d4c072583dec987225b6fe3f5524a735f42 upstream.

Move the SoC register value queries and tests to specific functions,
to remove repetition of logic
No functional changes intended

Signed-off-by: John Thomson 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

mips: ralink: mt7621: define MT7621_SYSC_BASE with __iomem

2022-12-21T16:48:03+00:00

commit a2cab953b4c077cc02878d424466d3a6eac32aaf upstream.

So that MT7621_SYSC_BASE can be used later in multiple functions without
needing to repeat this __iomem declaration each time

Signed-off-by: John Thomson 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'mm-hotfixes-stable-2022-12-02' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-12-02T21:39:38+00:00

Pull misc hotfixes from Andrew Morton:
 "15 hotfixes,  11 marked cc:stable.

  Only three or four of the latter address post-6.0 issues, which is
  hopefully a sign that things are converging"

* tag 'mm-hotfixes-stable-2022-12-02' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
  revert "kbuild: fix -Wimplicit-function-declaration in license_is_gpl_compatible"
  Kconfig.debug: provide a little extra FRAME_WARN leeway when KASAN is enabled
  drm/amdgpu: temporarily disable broken Clang builds due to blown stack-frame
  mm/khugepaged: invoke MMU notifiers in shmem/file collapse paths
  mm/khugepaged: fix GUP-fast interaction by sending IPI
  mm/khugepaged: take the right locks for page table retraction
  mm: migrate: fix THP's mapcount on isolation
  mm: introduce arch_has_hw_nonleaf_pmd_young()
  mm: add dummy pmd_young() for architectures not having it
  mm/damon/sysfs: fix wrong empty schemes assumption under online tuning in damon_sysfs_set_schemes()
  tools/vm/slabinfo-gnuplot: use "grep -E" instead of "egrep"
  nilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry()
  hugetlb: don't delete vma_lock in hugetlb MADV_DONTNEED processing
  madvise: use zap_page_range_single for madvise dontneed
  mm: replace VM_WARN_ON to pr_warn if the node is offline with __GFP_THISNODE