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| author |   Lucas De Marchi <lucas.demarchi@intel.com> | 2025-04-02 22:38:05 -0700 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2025-04-07 14:22:35 -0700 |
| commit | 1e1981b16bb1bbe2fafa57ed439b45cb5b34e32d (patch) | |
| tree | 43849cee41995d4290832c1cc10e419a65520ef8 /scripts/lib/kdoc/kdoc_output.py | |
| parent | drm/xe: Ensure XE_BO_FLAG_CPU_ADDR_MIRROR has a unique value (diff) | |
| download | linux-rng-1e1981b16bb1bbe2fafa57ed439b45cb5b34e32d.tar.xz linux-rng-1e1981b16bb1bbe2fafa57ed439b45cb5b34e32d.zip | |
drm/xe: Fix taking invalid lock on wedge
If device wedges on e.g. GuC upload, the submission is not yet enabled
and the state is not even initialized. Protect the wedge call so it does
nothing in this case. It fixes the following splat:
[] xe 0000:bf:00.0: [drm] device wedged, needs recovery
[] ------------[ cut here ]------------
[] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
[] WARNING: CPU: 48 PID: 312 at kernel/locking/mutex.c:564 __mutex_lock+0x8a1/0xe60
...
[] RIP: 0010:__mutex_lock+0x8a1/0xe60
[] mutex_lock_nested+0x1b/0x30
[] xe_guc_submit_wedge+0x80/0x2b0 [xe]
Reviewed-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Link: https://lore.kernel.org/r/20250402-warn-after-wedge-v1-1-93e971511fa5@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_output.py')
0 files changed, 0 insertions, 0 deletions