IB/uverbs: Fix return of PTR_ERR() of wrong pointer in ib_uverbs_get_context()

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/core/uverbs_cmd.c

@@ -285,7 +285,7 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
 
 	ucontext = ibdev->alloc_ucontext(ibdev, &udata);
 	if (IS_ERR(ucontext)) {
-		ret = PTR_ERR(file->ucontext);
+		ret = PTR_ERR(ucontext);
 		goto err;
 	}