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| author |   Lucas Stach <l.stach@pengutronix.de> | 2017-03-22 12:07:23 +0100 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2017-03-29 15:38:46 +0200 |
| commit | f3cd1b064f1179d9e6188c6d67297a2360880e10 (patch) | |
| tree | 3e1b2d052a0661101c2a6fd0365c0f7c552bf51d /drivers/gpu/drm | |
| parent | Linux 4.11-rc1 (diff) | |
| download | linux-dev-f3cd1b064f1179d9e6188c6d67297a2360880e10.tar.xz linux-dev-f3cd1b064f1179d9e6188c6d67297a2360880e10.zip | |
drm/etnaviv: (re-)protect fence allocation with GPU mutex
The fence allocation needs to be protected by the GPU mutex, otherwise
the fence seqnos of concurrent submits might not match the insertion order
of the jobs in the kernel ring. This breaks the assumption that jobs
complete with monotonically increasing fence seqnos.
Fixes: d9853490176c (drm/etnaviv: take GPU lock later in the submit process)
CC: stable@vger.kernel.org #4.9+
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c index 130d7d517a19..da48819ff2e6 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c @@ -1311,6 +1311,8 @@ int etnaviv_gpu_submit(struct etnaviv_gpu *gpu, goto out_pm_put; } + mutex_lock(&gpu->lock); + fence = etnaviv_gpu_fence_alloc(gpu); if (!fence) { event_free(gpu, event); @@ -1318,8 +1320,6 @@ int etnaviv_gpu_submit(struct etnaviv_gpu *gpu, goto out_pm_put; } - mutex_lock(&gpu->lock); - gpu->event[event].fence = fence; submit->fence = fence->seqno; gpu->active_fence = submit->fence; |