提交 f6ff4f67 编写于 作者: N Nicolai Hähnle 提交者: Alex Deucher

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: NNicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org
上级 b19763d0
......@@ -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) {
......
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