4.9-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Hellstrom thellstrom@vmware.com
commit 728354c005c36eaf44b6e5552372b67e60d17f56 upstream.
The function was unconditionally returning 0, and a caller would have to rely on the returned fence pointer being NULL to detect errors. However, the function vmw_execbuf_copy_fence_user() would expect a non-zero error code in that case and would BUG otherwise.
So make sure we return a proper non-zero error code if the fence pointer returned is NULL.
Cc: stable@vger.kernel.org Fixes: ae2a104058e2: ("vmwgfx: Implement fence objects") Signed-off-by: Thomas Hellstrom thellstrom@vmware.com Reviewed-by: Deepak Rawat drawat@vmware.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c @@ -3769,7 +3769,7 @@ int vmw_execbuf_fence_commands(struct dr *p_fence = NULL; }
- return 0; + return ret; }
/**