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intel: make bo_unreference() thread safe

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Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
This commit is contained in:
Lionel Landwerlin 2014-09-12 13:48:37 +01:00 • committed by Damien Lespiau
parent 743af59669
commit 88025ad808
1 changed files with 8 additions and 3 deletions
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11
intel/intel_bufmgr_gem.c
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@ -1157,7 +1157,8 @@ static void drm_intel_gem_bo_unreference(drm_intel_bo *bo)
drm_intel_bo_gem *bo_gem = (drm_intel_bo_gem *) bo;
assert(atomic_read(&bo_gem->refcount) > 0);
if (atomic_dec_and_test(&bo_gem->refcount)) {
if (atomic_add_unless(&bo_gem->refcount, -1, 1)) {
drm_intel_bufmgr_gem *bufmgr_gem =
(drm_intel_bufmgr_gem *) bo->bufmgr;
struct timespec time;
@ -1165,8 +1166,12 @@ static void drm_intel_gem_bo_unreference(drm_intel_bo *bo)
clock_gettime(CLOCK_MONOTONIC, &time);
pthread_mutex_lock(&bufmgr_gem->lock);
drm_intel_gem_bo_unreference_final(bo, time.tv_sec);
drm_intel_gem_cleanup_bo_cache(bufmgr_gem, time.tv_sec);
if (atomic_dec_and_test(&bo_gem->refcount)) {
drm_intel_gem_bo_unreference_final(bo, time.tv_sec);
drm_intel_gem_cleanup_bo_cache(bufmgr_gem, time.tv_sec);
}
pthread_mutex_unlock(&bufmgr_gem->lock);
}
}