diff options
| author | Jingwen Chen <Jingwen.Chen2@amd.com> | 2021-07-01 10:19:17 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-07-13 11:48:09 -0400 |
| commit | 798c511548b946ae9ec123b0dfe197a5f29e63ec (patch) | |
| tree | 21f96cd2114233c656d2507b22ff5667e0385a6b /drivers/gpu | |
| parent | 1e7b5812f4890ad84058bbb6c4a5deddfb2c5b25 (diff) | |
| download | linux-798c511548b946ae9ec123b0dfe197a5f29e63ec.tar.bz2 | |
drm/amdgpu: SRIOV flr_work should take write_lock
[Why]
If flr_work takes read_lock, then other threads who takes
read_lock can access hardware when host is doing vf flr.
[How]
flr_work should take write_lock to avoid this case.
Signed-off-by: Jingwen Chen <Jingwen.Chen2@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c index 3ee481557fc9..ff2307d7ee0f 100644 --- a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c +++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c @@ -252,7 +252,7 @@ static void xgpu_ai_mailbox_flr_work(struct work_struct *work) * otherwise the mailbox msg will be ruined/reseted by * the VF FLR. */ - if (!down_read_trylock(&adev->reset_sem)) + if (!down_write_trylock(&adev->reset_sem)) return; amdgpu_virt_fini_data_exchange(adev); @@ -268,7 +268,7 @@ static void xgpu_ai_mailbox_flr_work(struct work_struct *work) flr_done: atomic_set(&adev->in_gpu_reset, 0); - up_read(&adev->reset_sem); + up_write(&adev->reset_sem); /* Trigger recovery for world switch failure if no TDR */ if (amdgpu_device_should_recover_gpu(adev) diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c index 48e588d3c409..9f7aac435d69 100644 --- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c +++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c @@ -273,7 +273,7 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct *work) * otherwise the mailbox msg will be ruined/reseted by * the VF FLR. */ - if (!down_read_trylock(&adev->reset_sem)) + if (!down_write_trylock(&adev->reset_sem)) return; amdgpu_virt_fini_data_exchange(adev); @@ -289,7 +289,7 @@ static void xgpu_nv_mailbox_flr_work(struct work_struct *work) flr_done: atomic_set(&adev->in_gpu_reset, 0); - up_read(&adev->reset_sem); + up_write(&adev->reset_sem); /* Trigger recovery for world switch failure if no TDR */ if (amdgpu_device_should_recover_gpu(adev) |