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drm/amdgpu: fix dma_fence_wait without reference 

We need to grab a reference to the fence we wait for.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2019-08-16 14:56:35 +02:00 committed by Alex Deucher
parent 7837951a12
commit 42068e1ef9
1 changed files with 15 additions and 12 deletions
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27
drivers/gpu/drm/amd/amdgpu/amdgpu_ctx.c
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@ -534,21 +534,24 @@ int amdgpu_ctx_wait_prev_fence(struct amdgpu_ctx *ctx,
struct drm_sched_entity *entity)
{
struct amdgpu_ctx_entity *centity = to_amdgpu_ctx_entity(entity);
unsigned idx = centity->sequence & (amdgpu_sched_jobs - 1);
struct dma_fence *other = centity->fences[idx];
struct dma_fence *other;
unsigned idx;
long r;
if (other) {
signed long r;
r = dma_fence_wait(other, true);
if (r < 0) {
if (r != -ERESTARTSYS)
DRM_ERROR("Error (%ld) waiting for fence!\n", r);
spin_lock(&ctx->ring_lock);
idx = centity->sequence & (amdgpu_sched_jobs - 1);
other = dma_fence_get(centity->fences[idx]);
spin_unlock(&ctx->ring_lock);
return r;
}
}
if (!other)
return 0;
return 0;
r = dma_fence_wait(other, true);
if (r < 0 && r != -ERESTARTSYS)
DRM_ERROR("Error (%ld) waiting for fence!\n", r);
dma_fence_put(other);
return r;
}
void amdgpu_ctx_mgr_init(struct amdgpu_ctx_mgr *mgr)