[PATCH 5.4 12/64] usb: gadget: dont release an existing dev->buf

From: Greg Kroah-Hartman
Date: Mon Mar 07 2022 - 04:33:57 EST


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
@@ -1829,8 +1829,9 @@ 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;