[PATCH] io_uring: fix an IS_ERR() vs NULL check

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

The alloc_fixed_file_ref_node() function never returns NULL, it returns
error pointers on error.

Fixes: 1ffc54220c44 ("io_uring: fix io_sqe_files_unregister() hangs")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 fs/io_uring.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index ca46f314640b..2234ce03034a 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7255,8 +7255,8 @@ static int io_sqe_files_unregister(struct io_ring_ctx *ctx)
 	if (!data)
 		return -ENXIO;
 	backup_node = alloc_fixed_file_ref_node(ctx);
-	if (!backup_node)
-		return -ENOMEM;
+	if (IS_ERR(backup_node))
+		return PTR_ERR(backup_node);
 
 	spin_lock_bh(&data->lock);
 	ref_node = data->node;
-- 
2.29.2