linux-kernel - [PATCH] usb: gadget: f_fs: add missing spinlock and mutex unlock

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Date:	Mon, 10 Mar 2014 09:33:37 +0100
From:	Robert Baldyga <r.baldyga@...sung.com>
To:	balbi@...com
Cc:	gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, mina86@...a86.com,
	m.szyprowski@...sung.com, andrzej.p@...sung.com,
	Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH] usb: gadget: f_fs: add missing spinlock and mutex unlock

This patch adds missing spin_unlock and mutex_unlock calls in
error handling code.

Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
---
 drivers/usb/gadget/f_fs.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index b7d273a..d6bd0a3 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -802,7 +802,7 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
 		if (io_data->aio) {
 			req = usb_ep_alloc_request(ep->ep, GFP_KERNEL);
 			if (unlikely(!req))
-				goto error;
+				goto error_lock;
 
 			req->buf      = data;
 			req->length   = io_data->len;
@@ -817,7 +817,7 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
 			ret = usb_ep_queue(ep->ep, req, GFP_ATOMIC);
 			if (unlikely(ret)) {
 				usb_ep_free_request(ep->ep, req);
-				goto error;
+				goto error_lock;
 			}
 			ret = -EIOCBQUEUED;
 
@@ -863,6 +863,10 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
 
 	mutex_unlock(&epfile->mutex);
 	return ret;
+
+error_lock:
+	spin_unlock_irq(&epfile->ffs->eps_lock);
+	mutex_unlock(&epfile->mutex);
 error:
 	kfree(data);
 	return ret;
-- 
1.7.9.5

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