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vmwgfx: return -EFAULT if copy_to_user fails

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copy_to_user() returns the number of bytes remaining to be copied, but
we want to return a negative error code.  This gets copied to user
space.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dan Carpenter
2010-07-10 16:30:04 +02:00
committed by Dave Airlie
parent 772a2f9b48
commit 4ede00c966
1 changed files with 1 additions and 0 deletions
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drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
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@@ -972,6 +972,7 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
ret = copy_from_user(rects, user_rects, rects_size); ret = copy_from_user(rects, user_rects, rects_size);
if (unlikely(ret != 0)) { if (unlikely(ret != 0)) {
DRM_ERROR("Failed to get rects.\n"); DRM_ERROR("Failed to get rects.\n");
ret = -EFAULT;
goto out_free; goto out_free;
} }