Am 19.05.2016 um 13:11 schrieb Muhammad Falak R Wani: > Use kmemdup when some other buffer is immediately copied into allocated > region. It replaces call to allocation followed by memcpy, by a single > call to kmemdup. > > Signed-off-by: Muhammad Falak R Wani <falakreyaz at gmail.com>
NAK, actually using memcpy() is wrong in the first place. The UVD BO is in VRAM so the pointer is pointing to IO memory here, so this should be memcpy_fromio() instead of memcpy(). Christian. > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c > b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c > index 01abfc2..c977ab6 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c > @@ -295,12 +295,10 @@ int amdgpu_uvd_suspend(struct amdgpu_device *adev) > size = amdgpu_bo_size(adev->uvd.vcpu_bo); > ptr = adev->uvd.cpu_addr; > > - adev->uvd.saved_bo = kmalloc(size, GFP_KERNEL); > + adev->uvd.saved_bo = kmemdup(ptr, size, GFP_KERNEL); > if (!adev->uvd.saved_bo) > return -ENOMEM; > > - memcpy(adev->uvd.saved_bo, ptr, size); > - > return 0; > } >
