accel/amdxdna: Prevent PM resume deadlock in hwctx_sync_debug_bo()

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amdxdna_hwctx_sync_debug_bo() invokes the hardware hwctx_sync_debug_bo()
callback while holding xdna->dev_lock.

The callback may call amdxdna_cmd_submit(), which in turn calls
amdxdna_pm_resume_get(). If the device is suspended,
amdxdna_pm_resume_get() may synchronously execute amdxdna_pm_resume(),
which also acquires xdna->dev_lock, resulting in a deadlock.

Avoid the deadlock by calling amdxdna_pm_resume_get() before holding
xdna->dev_lock in both amdxdna_hwctx_sync_debug_bo() and
amdxdna_drm_config_hwctx_ioctl()

Fixes: 7ea0468380 ("accel/amdxdna: Support firmware debug buffer")
Reviewed-by: Max Zhen <max.zhen@amd.com>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260616212429.3620645-1-lizhi.hou@amd.com

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This commit is contained in:

Lizhi Hou 2026-06-16 14:24:29 -07:00

parent 6bb8898f70

commit e35c9cf551

2 changed files with 23 additions and 5 deletions

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2

drivers/accel/amdxdna/aie2_ctx.c

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26

drivers/accel/amdxdna/amdxdna_ctx.c

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