From 6817bf283b2b851095825ec7f0e9f10398e09125 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Christian=20K=C3=B6nig?= Date: Mon, 9 Sep 2019 13:57:32 +0200 Subject: [PATCH] drm/amdgpu: grab the id mgr lock while accessing passid_mapping MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Need to make sure that we actually dropping the right fence. Could be done with RCU as well, but to complicated for a fix. Signed-off-by: Christian König Reviewed-by: Chunming Zhou Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 5acedbab7596..17aca26ebf88 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1036,10 +1036,8 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_ id->oa_base != job->oa_base || id->oa_size != job->oa_size); bool vm_flush_needed = job->vm_needs_flush; - bool pasid_mapping_needed = id->pasid != job->pasid || - !id->pasid_mapping || - !dma_fence_is_signaled(id->pasid_mapping); struct dma_fence *fence = NULL; + bool pasid_mapping_needed; unsigned patch_offset = 0; int r; @@ -1049,6 +1047,12 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_ pasid_mapping_needed = true; } + mutex_lock(&id_mgr->lock); + if (id->pasid != job->pasid || !id->pasid_mapping || + !dma_fence_is_signaled(id->pasid_mapping)) + pasid_mapping_needed = true; + mutex_unlock(&id_mgr->lock); + gds_switch_needed &= !!ring->funcs->emit_gds_switch; vm_flush_needed &= !!ring->funcs->emit_vm_flush && job->vm_pd_addr != AMDGPU_BO_INVALID_OFFSET; @@ -1088,9 +1092,11 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job, bool need_ } if (pasid_mapping_needed) { + mutex_lock(&id_mgr->lock); id->pasid = job->pasid; dma_fence_put(id->pasid_mapping); id->pasid_mapping = dma_fence_get(fence); + mutex_unlock(&id_mgr->lock); } dma_fence_put(fence); -- 2.30.2