[PATCH 4.19 61/77] USB: gadget: legacy: fix return error code in acm_ms_bind()

[Greg Kroah-Hartman]

From: Yang Yingliang <yangyingli...@huawei.com>

commit c91d3a6bcaa031f551ba29a496a8027b31289464 upstream.

If usb_otg_descriptor_alloc() failed, it need return ENOMEM.

Fixes: 578aa8a2b12c ("usb: gadget: acm_ms: allocate and init otg descriptor by 
otg capabilities")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Yang Yingliang <yangyingli...@huawei.com>
Cc: stable <sta...@vger.kernel.org>
Link: 
https://lore.kernel.org/r/20201117092955.4102785-1-yangyingli...@huawei.com
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/usb/gadget/legacy/acm_ms.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/usb/gadget/legacy/acm_ms.c
+++ b/drivers/usb/gadget/legacy/acm_ms.c
@@ -203,8 +203,10 @@ static int acm_ms_bind(struct usb_compos
                struct usb_descriptor_header *usb_desc;
 
                usb_desc = usb_otg_descriptor_alloc(gadget);
-               if (!usb_desc)
+               if (!usb_desc) {
+                       status = -ENOMEM;
                        goto fail_string_ids;
+               }
                usb_otg_descriptor_init(gadget, usb_desc);
                otg_desc[0] = usb_desc;
                otg_desc[1] = NULL;