diff options
| author | Wayne Lin <[email protected]> | 2020-08-18 03:19:42 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2020-08-26 20:40:19 +0000 |
| commit | ec314c4612653aaf6e8d6a7c23fed9b3f7a0039f (patch) | |
| tree | 12ca67f2f39361717caa7d409471d9d542b2ac70 | |
| parent | drm/amdgpu: Fix buffer overflow in INFO ioctl (diff) | |
| download | kernel-ec314c4612653aaf6e8d6a7c23fed9b3f7a0039f.tar.gz kernel-ec314c4612653aaf6e8d6a7c23fed9b3f7a0039f.zip | |
drm/amd/display: Retry AUX write when fail occurs
[Why]
In dm_dp_aux_transfer() now, we forget to handle AUX_WR fail cases. We
suppose every write wil get done successfully and hence some AUX
commands might not sent out indeed.
[How]
Check if AUX_WR success. If not, retry it.
Signed-off-by: Wayne Lin <[email protected]>
Reviewed-by: Hersen Wu <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c index bbc20834c643..bd477a166015 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c @@ -67,7 +67,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload, &operation_result); - if (payload.write) + if (payload.write && result >= 0) result = msg->size; if (result < 0) |