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| author | Andrey Grodzovsky <andrey.grodzovsky@amd.com> | 2021-05-12 17:26:41 +0300 |
|---|---|---|
| committer | Andrey Grodzovsky <andrey.grodzovsky@amd.com> | 2021-05-20 06:50:28 +0300 |
| commit | f89f8c6bafd0692d3afd21488d012ceb1baf6df6 (patch) | |
| tree | a6f34cf205887bef775c4aad48536e0760181a17 /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | |
| parent | 35bba8313b95a5cd074fc910a9c2670b4a1b105d (diff) | |
| download | linux-f89f8c6bafd0692d3afd21488d012ceb1baf6df6.tar.xz | |
drm/amdgpu: Guard against write accesses after device removal
This should prevent writing to memory or IO ranges possibly
already allocated for other uses after our device is removed.
v5:
Protect more places wher memcopy_to/form_io takes place
Protect IB submissions
v6: Switch to !drm_dev_enter instead of scoping entire code
with brackets.
v7:
Drop guard of HW ring commands emission protection since they
are in GART and not in MMIO.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210512142648.666476-10-andrey.grodzovsky@amd.com
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 4a3e3f72e127..90c34491f85d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -32,6 +32,7 @@ #include <linux/dma-buf.h> #include <drm/amdgpu_drm.h> +#include <drm/drm_drv.h> #include "amdgpu.h" #include "amdgpu_trace.h" #include "amdgpu_amdkfd.h" @@ -1606,7 +1607,10 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, struct amdgpu_vm_update_params params; enum amdgpu_sync_mode sync_mode; uint64_t pfn; - int r; + int r, idx; + + if (!drm_dev_enter(&adev->ddev, &idx)) + return -ENODEV; memset(¶ms, 0, sizeof(params)); params.adev = adev; @@ -1715,6 +1719,7 @@ static int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, error_unlock: amdgpu_vm_eviction_unlock(vm); + drm_dev_exit(idx); return r; } |