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| author | Dave Airlie <[email protected]> | 2021-07-23 01:16:58 +0000 |
|---|---|---|
| committer | Dave Airlie <[email protected]> | 2021-07-23 01:17:03 +0000 |
| commit | 2e41a6696bf828a7b06f520d147f6911c947a7af (patch) | |
| tree | 2d2e67d8db29805deabe248647fbbf815dd88e44 /drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | |
| parent | Merge tag 'drm-intel-fixes-2021-07-22' of git://anongit.freedesktop.org/drm/d... (diff) | |
| parent | drm/panel: raspberrypi-touchscreen: Prevent double-free (diff) | |
| download | kernel-2e41a6696bf828a7b06f520d147f6911c947a7af.tar.gz kernel-2e41a6696bf828a7b06f520d147f6911c947a7af.zip | |
Merge tag 'drm-misc-fixes-2021-07-22' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
Short summary of fixes pull:
* Return -ENOTTY for non-DRM ioctls
* amdgpu: Fix COW checks
* nouveau: init BO GME fields
* panel: Avoid double free
* ttm: Fix refcounting in ttm_global_init(); NULL checks
* vc4: Fix interrupt handling
Signed-off-by: Dave Airlie <[email protected]>
From: Thomas Zimmermann <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c index d0d9bc445d7b..854fc497844b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c @@ -255,6 +255,15 @@ static int amdgpu_gem_object_mmap(struct drm_gem_object *obj, struct vm_area_str if (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS) return -EPERM; + /* Workaround for Thunk bug creating PROT_NONE,MAP_PRIVATE mappings + * for debugger access to invisible VRAM. Should have used MAP_SHARED + * instead. Clearing VM_MAYWRITE prevents the mapping from ever + * becoming writable and makes is_cow_mapping(vm_flags) false. + */ + if (is_cow_mapping(vma->vm_flags) && + !(vma->vm_flags & (VM_READ | VM_WRITE | VM_EXEC))) + vma->vm_flags &= ~VM_MAYWRITE; + return drm_gem_ttm_mmap(obj, vma); } |