accel/amdxdna: Fix potential deadlock in BO open and close callbacks

Browse source

In amdxdna_gem_obj_open(), abo->lock is held when calling
amdxdna_gem_add_bo_usage(), which then acquires client->mm_lock.

However, the heap update path may acquire these locks in the reverse
order, creating a potential deadlock.

Fix this by saving the client pointer locally before acquiring abo->lock,
and releasing abo->lock before calling amdxdna_gem_add_bo_usage().

Apply the same change to amdxdna_gem_obj_close().

Fixes: 1f513a3ec3 ("accel/amdxdna: Add per-process BO memory usage query support")
Reviewed-by: Max Zhen <max.zhen@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260902180955.3999242-2-lizhi.hou@amd.com

...

This commit is contained in:

Lizhi Hou 2026-09-02 11:09:55 -07:00

parent d0c0ffdba9

commit 1bc13a9d93

1 changed files with 22 additions and 12 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

34

drivers/accel/amdxdna/amdxdna_gem.c

View file