From 8913f7ff0580605093563688f58e427dd0014609 Mon Sep 17 00:00:00 2001 From: Bhawanpreet Lakha Date: Mon, 30 Mar 2020 17:44:00 -0400 Subject: drm/amd/display: Guard calls to hdcp_ta and dtm_ta [Why] The buffer used when calling psp is a shared buffer. If we have multiple calls at the same time we can overwrite the buffer. [How] Add mutex to guard the shared buffer. Signed-off-by: Bhawanpreet Lakha Reviewed-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h index 297435c0c7c1..6a717fd5efc7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h @@ -161,6 +161,7 @@ struct psp_hdcp_context { struct amdgpu_bo *hdcp_shared_bo; uint64_t hdcp_shared_mc_addr; void *hdcp_shared_buf; + struct mutex mutex; }; struct psp_dtm_context { @@ -169,6 +170,7 @@ struct psp_dtm_context { struct amdgpu_bo *dtm_shared_bo; uint64_t dtm_shared_mc_addr; void *dtm_shared_buf; + struct mutex mutex; }; #define MEM_TRAIN_SYSTEM_SIGNATURE 0x54534942 -- cgit v1.2.3-70-g09d2