linux-stable.git/drivers/fpga, branch v6.12.4

move asm/unaligned.h to linux/unaligned.h

2024-10-02T21:23:23+00:00

asm/unaligned.h is always an include of asm-generic/unaligned.h;
might as well move that thing to linux/unaligned.h and include
that - there's nothing arch-specific in that header.

auto-generated by the following:

for i in `git grep -l -w asm/unaligned.h`; do
	sed -i -e "s/asm\/unaligned.h/linux\/unaligned.h/" $i
done
for i in `git grep -l -w asm-generic/unaligned.h`; do
	sed -i -e "s/asm-generic\/unaligned.h/linux\/unaligned.h/" $i
done
git mv include/asm-generic/unaligned.h include/linux/unaligned.h
git mv tools/include/asm-generic/unaligned.h tools/include/linux/unaligned.h
sed -i -e "/unaligned.h/d" include/asm-generic/Kbuild
sed -i -e "s/__ASM_GENERIC/__LINUX/" include/linux/unaligned.h tools/include/linux/unaligned.h

fpga: zynq-fpga: Rename 'timeout' variable as 'time_left'

2024-08-14T15:58:14+00:00

There is a confusing pattern in the kernel to use a variable named
'timeout' to store the result of wait_for_completion_timeout() causing
patterns like:

        timeout = wait_for_completion_timeout(...)
        if (!timeout) return -ETIMEDOUT;

with all kinds of permutations. Use 'time_left' as a variable to make the
code self explaining.

Signed-off-by: Wolfram Sang 
Acked-by: Michal Simek 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20240729104319.2658-2-wsa+renesas@sang-engineering.com
Signed-off-by: Xu Yilun

fpga: socfpga: Rename 'timeout' variable as 'time_left'

2024-08-14T15:57:07+00:00

There is a confusing pattern in the kernel to use a variable named
'timeout' to store the result of
wait_for_completion_interruptible_timeout() causing patterns like:

        timeout = wait_for_completion_interruptible_timeout(...)
        if (!timeout) return -ETIMEDOUT;

with all kinds of permutations. Use 'time_left' as a variable to make the
code self explaining.

Fix to the proper variable type 'long' while here.

Signed-off-by: Wolfram Sang 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20240729104319.2658-1-wsa+renesas@sang-engineering.com
Signed-off-by: Xu Yilun

fpga: Simplify and improve fpga region test using deferred actions

2024-08-14T15:51:04+00:00

Use deferred actions to simplify the test suite and avoid potential memory
leaks when test cases fail. Remove unnecessary calls to
kunit_device_unregister() since kunit devices are tied to the test context
and released by a deferred action when the test is completed.

Other changes: fix a typo by changing the test suite name to fpga_region in
the kunit_suite struct.

Signed-off-by: Marco Pagani 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20240725125031.308195-4-marpagan@redhat.com
Signed-off-by: Xu Yilun

fpga: Simplify and improve fpga bridge test using deferred actions

2024-08-14T15:51:03+00:00

Use deferred actions to simplify the test suite and avoid potential memory
leaks when test cases fail. Remove unnecessary calls to
kunit_device_unregister() since kunit devices are tied to the test context
and released by a deferred action when the test is completed.

Signed-off-by: Marco Pagani 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20240725125031.308195-3-marpagan@redhat.com
Signed-off-by: Xu Yilun

fpga: Simplify and improve fpga mgr test using deferred actions

2024-08-14T15:50:01+00:00

Use deferred actions to simplify the test suite and avoid potential memory
leaks when test cases fail. Remove unnecessary calls to
kunit_device_unregister() since kunit devices are tied to the test context
and released by a deferred action when the test is completed.

Signed-off-by: Marco Pagani 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20240725125031.308195-2-marpagan@redhat.com
Signed-off-by: Xu Yilun

Merge tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2024-07-25T17:42:22+00:00

Pull driver core updates from Greg KH:
 "Here is the big set of driver core changes for 6.11-rc1.

  Lots of stuff in here, with not a huge diffstat, but apis are evolving
  which required lots of files to be touched. Highlights of the changes
  in here are:

   - platform remove callback api final fixups (Uwe took many releases
     to get here, finally!)

   - Rust bindings for basic firmware apis and initial driver-core
     interactions.

     It's not all that useful for a "write a whole driver in rust" type
     of thing, but the firmware bindings do help out the phy rust
     drivers, and the driver core bindings give a solid base on which
     others can start their work.

     There is still a long way to go here before we have a multitude of
     rust drivers being added, but it's a great first step.

   - driver core const api changes.

     This reached across all bus types, and there are some fix-ups for
     some not-common bus types that linux-next and 0-day testing shook
     out.

     This work is being done to help make the rust bindings more safe,
     as well as the C code, moving toward the end-goal of allowing us to
     put driver structures into read-only memory. We aren't there yet,
     but are getting closer.

   - minor devres cleanups and fixes found by code inspection

   - arch_topology minor changes

   - other minor driver core cleanups

  All of these have been in linux-next for a very long time with no
  reported problems"

* tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
  ARM: sa1100: make match function take a const pointer
  sysfs/cpu: Make crash_hotplug attribute world-readable
  dio: Have dio_bus_match() callback take a const *
  zorro: make match function take a const pointer
  driver core: module: make module_[add|remove]_driver take a const *
  driver core: make driver_find_device() take a const *
  driver core: make driver_[create|remove]_file take a const *
  firmware_loader: fix soundness issue in `request_internal`
  firmware_loader: annotate doctests as `no_run`
  devres: Correct code style for functions that return a pointer type
  devres: Initialize an uninitialized struct member
  devres: Fix memory leakage caused by driver API devm_free_percpu()
  devres: Fix devm_krealloc() wasting memory
  driver core: platform: Switch to use kmemdup_array()
  driver core: have match() callback in struct bus_type take a const *
  MAINTAINERS: add Rust device abstractions to DRIVER CORE
  device: rust: improve safety comments
  MAINTAINERS: add Danilo as FIRMWARE LOADER maintainer
  MAINTAINERS: add Rust FW abstractions to FIRMWARE LOADER
  firmware: rust: improve safety comments
  ...

driver core: have match() callback in struct bus_type take a const *

2024-07-03T13:16:54+00:00

In the match() callback, the struct device_driver * should not be
changed, so change the function callback to be a const *.  This is one
step of many towards making the driver core safe to have struct
device_driver in read-only memory.

Because the match() callback is in all busses, all busses are modified
to handle this properly.  This does entail switching some container_of()
calls to container_of_const() to properly handle the constant *.

For some busses, like PCI and USB and HV, the const * is cast away in
the match callback as those busses do want to modify those structures at
this point in time (they have a local lock in the driver structure.)
That will have to be changed in the future if they wish to have their
struct device * in read-only-memory.

Cc: Rafael J. Wysocki 
Reviewed-by: Alex Elder 
Acked-by: Sumit Garg 
Link: https://lore.kernel.org/r/2024070136-wrongdoer-busily-01e8@gregkh
Signed-off-by: Greg Kroah-Hartman

fpga: altera-fpga2sdram: remove unused struct 'prop_map'

2024-06-14T02:18:11+00:00

'prop_map' has been unused since the original
commit e5f8efa5c8bf ("ARM: socfpga: fpga bridge driver support").

Remove it.

Signed-off-by: Dr. David Alan Gilbert 
Reviewed-by: Russ Weight 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20240530205245.125513-1-linux@treblig.org
Signed-off-by: Xu Yilun

Revert "fpga: disable KUnit test suites when module support is enabled"

2024-06-11T09:56:12+00:00

This reverts commit a3fad2e92c76587fe262a1a4a122045b29885354.

The core components of the subsystem no longer assume that low-level
modules register a driver for the parent device and rely on its owner
pointer to take the module's refcount. KUnit test suites can now be safely
re-enabled with loadable module support.

Signed-off-by: Marco Pagani 
Acked-by: Xu Yilun 
Link: https://lore.kernel.org/r/20240604102536.59010-1-marpagan@redhat.com
Signed-off-by: Xu Yilun