[PATCH v3 1/1] io_uring: check for iowq alloc_workqueue failure

[Pavel Begunkov <asml.silence@xxxxxxxxx>]

alloc_workqueue() can fail even during init in io_uring_init(), check
the result and panic if anything went wrong.

Fixes: 73eaa2b583493 ("io_uring: use private workqueue for exit work")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---

v3: BUG_ON() since it seems nobody checks errors
v2: drop kmem_cache checking

 io_uring/io_uring.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 263e504be4a8b..dfebd949b8f37 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3920,6 +3920,7 @@ static int __init io_uring_init(void)
 					  SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT);
 
 	iou_wq = alloc_workqueue("iou_exit", WQ_UNBOUND, 64);
+	BUG_ON(!iou_wq);
 
 #ifdef CONFIG_SYSCTL
 	register_sysctl_init("kernel", kernel_io_uring_disabled_table);
-- 
2.47.1