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

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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>
This commit is contained in:
Hangyu Hua 2022-01-01 01:21:37 +08:00 committed by Greg Kroah-Hartman
parent 00d5ac05af
commit c13159a588
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/gadget/legacy/inode.c
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@ -1828,8 +1828,9 @@ dev_config (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
spin_lock_irq (&dev->lock); spin_lock_irq (&dev->lock);
value = -EINVAL; value = -EINVAL;
if (dev->buf) { if (dev->buf) {
spin_unlock_irq(&dev->lock);
kfree(kbuf); kfree(kbuf);
goto fail; return value;
} }
dev->buf = kbuf; dev->buf = kbuf;