diff options
| author | Maarten Lankhorst <maarten.lankhorst@canonical.com> | 2014-01-21 13:00:24 +0100 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@canonical.com> | 2014-09-01 10:16:42 +0200 |
| commit | d0b3c3b6c26c6eed1ba3fa37242dfc8942b5e997 (patch) | |
| tree | d0c0edaf033b87080f1617bc2ed82f7d12b0b802 | |
| parent | 04cd214516d8a6f0f8c0116185d6e360df0860d2 (diff) | |
drm/nouveau: add reservation to nouveau_gem_ioctl_cpu_prep
Apart from some code inside ttm itself and nouveau_bo_vma_del,
this is the only place where ttm_bo_wait is used without a reservation.
Fix this so we can remove the fence_lock later on.
After the switch to rcu the reservation lock will be
removed again.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Acked-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_gem.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_gem.c b/drivers/gpu/drm/nouveau/nouveau_gem.c index 292a677bfed4..0054315eb879 100644 --- a/drivers/gpu/drm/nouveau/nouveau_gem.c +++ b/drivers/gpu/drm/nouveau/nouveau_gem.c @@ -884,17 +884,31 @@ nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data, struct drm_gem_object *gem; struct nouveau_bo *nvbo; bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT); - int ret = -EINVAL; + int ret; + struct nouveau_fence *fence = NULL; gem = drm_gem_object_lookup(dev, file_priv, req->handle); if (!gem) return -ENOENT; nvbo = nouveau_gem_object(gem); - spin_lock(&nvbo->bo.bdev->fence_lock); - ret = ttm_bo_wait(&nvbo->bo, true, true, no_wait); - spin_unlock(&nvbo->bo.bdev->fence_lock); + ret = ttm_bo_reserve(&nvbo->bo, true, false, false, NULL); + if (!ret) { + spin_lock(&nvbo->bo.bdev->fence_lock); + ret = ttm_bo_wait(&nvbo->bo, true, true, true); + if (!no_wait && ret) + fence = nouveau_fence_ref(nvbo->bo.sync_obj); + spin_unlock(&nvbo->bo.bdev->fence_lock); + + ttm_bo_unreserve(&nvbo->bo); + } drm_gem_object_unreference_unlocked(gem); + + if (fence) { + ret = nouveau_fence_wait(fence, true, no_wait); + nouveau_fence_unref(&fence); + } + return ret; } |