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authorNicolai Hähnle <nicolai.haehnle@amd.com>2016-02-05 14:35:53 -0500
committerAlex Deucher <alexander.deucher@amd.com>2016-02-10 14:07:44 -0500
commitf6ff4f67cdf8455d0a4226eeeaf5af17c37d05eb (patch)
treeaf5411ce6dd25d290d0e56c731cdd12ed63660aa
parentb19763d0d867eb863953500a5c87f2fd663863b8 (diff)
drm/radeon: hold reference to fences in radeon_sa_bo_new
An arbitrary amount of time can pass between spin_unlock and radeon_fence_wait_any, so we need to ensure that nobody frees the fences from under us. Based on the analogous fix for amdgpu. Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Cc: stable@vger.kernel.org
-rw-r--r--drivers/gpu/drm/radeon/radeon_sa.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_sa.c b/drivers/gpu/drm/radeon/radeon_sa.c
index c507896aca45..197b157b73d0 100644
--- a/drivers/gpu/drm/radeon/radeon_sa.c
+++ b/drivers/gpu/drm/radeon/radeon_sa.c
@@ -349,8 +349,13 @@ int radeon_sa_bo_new(struct radeon_device *rdev,
/* see if we can skip over some allocations */
} while (radeon_sa_bo_next_hole(sa_manager, fences, tries));
+ for (i = 0; i < RADEON_NUM_RINGS; ++i)
+ radeon_fence_ref(fences[i]);
+
spin_unlock(&sa_manager->wq.lock);
r = radeon_fence_wait_any(rdev, fences, false);
+ for (i = 0; i < RADEON_NUM_RINGS; ++i)
+ radeon_fence_unref(&fences[i]);
spin_lock(&sa_manager->wq.lock);
/* if we have nothing to wait for block */
if (r == -ENOENT) {