[PATCH 4.19 12/51] usb: gadget: dont release an existing dev->buf

[Greg Kroah-Hartman]

From: Hangyu Hua <hbh25y@xxxxxxxxx>

commit 89f3594d0de58e8a57d92d497dea9fee3d4b9cda upstream.

dev->buf does not need to be released if it already exists before
executing dev_config.

Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Hangyu Hua <hbh25y@xxxxxxxxx>
Link: https://lore.kernel.org/r/20211231172138.7993-2-hbh25y@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/gadget/legacy/inode.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -1828,8 +1828,9 @@ dev_config (struct file *fd, const char
 	spin_lock_irq (&dev->lock);
 	value = -EINVAL;
 	if (dev->buf) {
+		spin_unlock_irq(&dev->lock);
 		kfree(kbuf);
-		goto fail;
+		return value;
 	}
 	dev->buf = kbuf;