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| author | Yintian Tao <yttao@amd.com> | 2020-04-23 12:05:54 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-04-24 11:42:11 -0400 |
| commit | 04e4e2e9558326316cf3e32d46cca83cc3861ef0 (patch) | |
| tree | d490fb722bfb5b8a59dc288505fd6544e46d45ef /drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | |
| parent | 312a79b6eafe5c45e3e232506a4a6e97d7cdbba4 (diff) | |
| download | linux-stable-04e4e2e9558326316cf3e32d46cca83cc3861ef0.tar.gz linux-stable-04e4e2e9558326316cf3e32d46cca83cc3861ef0.tar.bz2 linux-stable-04e4e2e9558326316cf3e32d46cca83cc3861ef0.zip | |
drm/amdgpu: protect ring overrun
Wait for the oldest sequence on the ring
to be signaled in order to make sure there
will be no command overrun.
v2: fix coding stype and remove abs operation
v3: remove the initialization of variable r
Signed-off-by: Yintian Tao <yttao@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c index fecdbc471983..0a6026308343 100644 --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c @@ -621,7 +621,13 @@ static int gmc_v9_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev, pasid, 2, all_hub); kiq->pmf->kiq_invalidate_tlbs(ring, pasid, flush_type, all_hub); - amdgpu_fence_emit_polling(ring, &seq); + r = amdgpu_fence_emit_polling(ring, &seq, MAX_KIQ_REG_WAIT); + if (r) { + amdgpu_ring_undo(ring); + spin_unlock(&kiq->ring_lock); + return -ETIME; + } + amdgpu_ring_commit(ring); spin_unlock(&adev->gfx.kiq.ring_lock); r = amdgpu_fence_wait_polling(ring, seq, adev->usec_timeout); |