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drm/vc4: Return -EFAULT on copy_from_user() failure 

The copy_from_user() function returns the number of bytes not copied but
we want to return a negative error code.

Fixes: 463873d570 ('drm/vc4: Add an API for creating GPU shaders in GEM BOs.')
Cc: stable@vger.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Dan Carpenter 2016-03-08 15:09:41 +03:00 committed by Eric Anholt
parent 0b06e0a794
commit 585cb132a4
1 changed files with 4 additions and 3 deletions
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7
drivers/gpu/drm/vc4/vc4_bo.c
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@ -499,11 +499,12 @@ vc4_create_shader_bo_ioctl(struct drm_device *dev, void *data,
if (IS_ERR(bo)) if (IS_ERR(bo))
return PTR_ERR(bo); return PTR_ERR(bo);
ret = copy_from_user(bo->base.vaddr, if (copy_from_user(bo->base.vaddr,
(void __user *)(uintptr_t)args->data, (void __user *)(uintptr_t)args->data,
args->size); args->size)) {
if (ret != 0) ret = -EFAULT;
goto fail; goto fail;
}
/* Clear the rest of the memory from allocating from the BO /* Clear the rest of the memory from allocating from the BO
* cache. * cache.
*/ */