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vmwgfx: return an -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 here.  I fixed a couple of these
last year, but I missed this one.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dan Carpenter 2012-11-12 11:07:24 +00:00 committed by Dave Airlie
parent 77b67063bb
commit 888155bbf6
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c
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@ -110,6 +110,8 @@ int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);
ret = copy_to_user(buffer, bounce, size);
if (ret)
ret = -EFAULT;
vfree(bounce);
if (unlikely(ret != 0))