diff options
| author | Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> | 2020-03-30 17:44:00 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-04-03 17:01:18 -0400 |
| commit | 8913f7ff0580605093563688f58e427dd0014609 (patch) | |
| tree | dcdf482acfa7f0c4cee6d69179bd02b3befc51df /drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | |
| parent | c0ed2ca61f9085a98b3b3d4a61582741adde9260 (diff) | |
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 <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c index dbaeffc4431e..9d587bc27663 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c @@ -888,6 +888,7 @@ static int psp_hdcp_load(struct psp_context *psp) if (!ret) { psp->hdcp_context.hdcp_initialized = true; psp->hdcp_context.session_id = cmd->resp.session_id; + mutex_init(&psp->hdcp_context.mutex); } kfree(cmd); @@ -1033,6 +1034,7 @@ static int psp_dtm_load(struct psp_context *psp) if (!ret) { psp->dtm_context.dtm_initialized = true; psp->dtm_context.session_id = cmd->resp.session_id; + mutex_init(&psp->dtm_context.mutex); } kfree(cmd); |