drm/xe: Use atomic instead of mutex for xe_device_mem_access_ongoing

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xe_guc_ct_fast_path() is called from an irq context, and cannot lock
the mutex used by xe_device_mem_access_ongoing().

Fortunately it is easy to fix, and the atomic guarantees are good enough
to ensure xe->mem_access.hold_rpm is set before last ref is dropped.

As far as I can tell, the runtime ref in device access should be
killable, but don't dare to do it yet.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Maarten Lankhorst 2023-02-28 11:17:30 +01:00 • committed by Rodrigo Vivi

parent 044f0cfb19

commit 38c04b47ce

3 changed files with 13 additions and 23 deletions

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20

drivers/gpu/drm/xe/xe_device.c

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16

drivers/gpu/drm/xe/xe_device.h

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4

drivers/gpu/drm/xe/xe_device_types.h

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