[PATCH 3/3] io_uring: check for iowq alloc_workqueue errors

[Pavel Begunkov <asml.silence@xxxxxxxxx>]

alloc_workqueue() can fail, check the result and return an error back
from io_uring_init() if needed.

Fixes: 73eaa2b583493 ("io_uring: use private workqueue for exit work")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
 io_uring/io_uring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index b05580c1a6424..78a6cc84304f2 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3925,6 +3925,8 @@ static int __init io_uring_init(void)
 		return -ENOMEM;
 
 	iou_wq = alloc_workqueue("iou_exit", WQ_UNBOUND, 64);
+	if (!iou_wq)
+		return -ENOMEM;
 
 #ifdef CONFIG_SYSCTL
 	register_sysctl_init("kernel", kernel_io_uring_disabled_table);
-- 
2.47.1