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drm/syncobj: call might_sleep before waiting for fence submission
If either the DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT or DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE flags are passed to drm_syncobj_array_wait_timeout, the function might sleep if the fence at one of the given timeline points has not yet been submitted. Therefore, we should call might_sleep in that case to catch potential bugs. Signed-off-by: Erik Kurzinger <ekurzinger@nvidia.com> Signed-off-by: Simon Ser <contact@emersion.fr> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Acked-by: Simon Ser <contact@emersion.fr> Link: https://patchwork.freedesktop.org/patch/msgid/20240119163208.3723457-3-ekurzinger@nvidia.com
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1 changed files with 3 additions and 1 deletions
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@ -1044,8 +1044,10 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
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uint32_t signaled_count, i;
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if (flags & (DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT |
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DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE))
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DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) {
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might_sleep();
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lockdep_assert_none_held_once();
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}
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points = kmalloc_array(count, sizeof(*points), GFP_KERNEL);
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if (points == NULL)
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