accel/amdxdna: Fix deadlock on debug BO command timeout

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Both amdxdna_hwctx_sync_debug_bo() and amdxdna_drm_config_hwctx_ioctl()
hold xdna->dev_lock while invoking backend operations. If the hardware
hangs, aie2_cmd_wait() blocks waiting for a firmware response. When the
DRM scheduler timeout expires, aie2_sched_job_timedout() is invoked to
reset the hardware. However, the timeout handler also attempts to acquire
dev_lock, resulting in a deadlock.

Avoid this by releasing dev_lock before waiting for the firmware
response and reacquiring it after the wait completes. This allows the
timeout handler to proceed with device recovery when a debug BO command
times out.

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/20260707055732.479103-1-lizhi.hou@amd.com

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This commit is contained in:

Lizhi Hou 2026-07-06 22:57:32 -07:00

parent 66ff5c0eee

commit c8d2530791

2 changed files with 10 additions and 1 deletions

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5

drivers/accel/amdxdna/aie2_ctx.c

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6

drivers/accel/amdxdna/amdxdna_ctx.c

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