usb: gadget: don't release an existing dev->buf

commit 89f3594d0de58e8a57d92d497dea9fee3d4b9cda upstream.

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

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20211231172138.7993-2-hbh25y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index 1b223cb..a6bc13c 100644 (file)
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -1829,8 +1829,9 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
        spin_lock_irq (&dev->lock);
        value = -EINVAL;
        if (dev->buf) {
+               spin_unlock_irq(&dev->lock);
                kfree(kbuf);
-               goto fail;
+               return value;
        }
        dev->buf = kbuf;