This patch series improves the arm_ffa notification callback handling by
addressing safety and memory issues. It replaces a mutex with an rwlock
to prevent sleeping in atomic context, resolving kernel warnings. Memory
allocation is moved outside the lock to support this transition safely.
Additionally, a memory leak in the notifier unregistration path is fixed
by properly freeing the callback node.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
Sudeep Holla (3):
      firmware: arm_ffa: Fix memory leak by freeing notifier callback node
      firmware: arm_ffa: Move memory allocation outside the mutex locking
      firmware: arm_ffa: Replace mutex with rwlock to avoid sleep in atomic context

 drivers/firmware/arm_ffa/driver.c | 71 ++++++++++++++++++++-------------------
 1 file changed, 36 insertions(+), 35 deletions(-)
---
base-commit: 0ff41df1cb268fc69e703a08a57ee14ae967d0ca
change-id: 20250528-ffa_notif_fix-f90903a2ed0b
-- 
Regards,
Sudeep

On Wed, 28 May 2025 09:49:40 +0100, Sudeep Holla wrote:
> This patch series improves the arm_ffa notification callback handling by
> addressing safety and memory issues. It replaces a mutex with an rwlock
> to prevent sleeping in atomic context, resolving kernel warnings. Memory
> allocation is moved outside the lock to support this transition safely.
> Additionally, a memory leak in the notifier unregistration path is fixed
> by properly freeing the callback node.
> 
> [...]

Applied to sudeep.holla/linux (for-next/ffa/fixes), thanks!

[1/3] firmware: arm_ffa: Fix memory leak by freeing notifier callback node
      https://git.kernel.org/sudeep.holla/c/a833d31ad867
[2/3] firmware: arm_ffa: Move memory allocation outside the mutex locking
      https://git.kernel.org/sudeep.holla/c/27e850c88df0
[3/3] firmware: arm_ffa: Replace mutex with rwlock to avoid sleep in atomic context
      https://git.kernel.org/sudeep.holla/c/9ca7a421229b

--
Regards,
Sudeep