[PATCH] usb: gadget: mass_storage: fix error return code in msg_bind()

[Chen Zhou]

Fix to return a negative error code from the error handling case
instead of 0 in function msg_bind(), as done elsewhere in this
function.

Fixes: d86788979761 ("usb: gadget: mass_storage: allocate and init otg 
descriptor by otg capabilities")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Chen Zhou <chenzho...@huawei.com>
---
 drivers/usb/gadget/legacy/mass_storage.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/legacy/mass_storage.c 
b/drivers/usb/gadget/legacy/mass_storage.c
index 9ed22c5fb7fe..7a88c5282d61 100644
--- a/drivers/usb/gadget/legacy/mass_storage.c
+++ b/drivers/usb/gadget/legacy/mass_storage.c
@@ -175,8 +175,10 @@ static int msg_bind(struct usb_composite_dev *cdev)
                struct usb_descriptor_header *usb_desc;
 
                usb_desc = usb_otg_descriptor_alloc(cdev->gadget);
-               if (!usb_desc)
+               if (IS_ERR(usb_desc)) {
+                       status = PTR_ERR(usb_desc);
                        goto fail_string_ids;
+               }
                usb_otg_descriptor_init(cdev->gadget, usb_desc);
                otg_desc[0] = usb_desc;
                otg_desc[1] = NULL;
-- 
2.20.1