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| author |   Lizhi Hou <lizhi.hou@amd.com> | 2026-06-16 14:24:29 -0700 |
|---|---|---|
| committer | Lizhi Hou <lizhi.hou@amd.com> | 2026-07-06 22:32:19 -0700 |
| commit | e35c9cf5512814fb04f369f2eada64f0a7164609 (patch) | |
| tree | 115bdf8bf0be04e712ea778aaee5bc0ddbcb2e07 /tools/lib/python | |
| parent | drm/bridge: analogix_dp: Fix PE/VS value shift mismatch during link training (diff) | |
accel/amdxdna: Prevent PM resume deadlock in hwctx_sync_debug_bo()
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: 7ea046838021 ("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
Diffstat (limited to 'tools/lib/python')
0 files changed, 0 insertions, 0 deletions