linux-kernel - [PATCH 3/5] usb: f_fs: replace unnecessary goto with a return

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Date:	Mon,  4 Jan 2016 22:41:39 +0100
From:	Michal Nazarewicz <mina86@...a86.com>
To:	Felipe Balbi <balbi@...com>, "Du, Changbin" <changbin.du@...el.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Robert Baldyga <r.baldyga@...sung.com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Michal Nazarewicz <mina86@...a86.com>
Subject: [PATCH 3/5] usb: f_fs: replace unnecessary goto with a return

In ffs_epfile_io error label points to a return path which includes
a kfree(data) call.  However, at the beginning of the function data is
always NULL so some of the early ‘goto error’ can safely be replaced
with a trivial return statement.

Signed-off-by: Michal Nazarewicz <mina86@...a86.com>
---
 drivers/usb/gadget/function/f_fs.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
index 1384220..c4e6395 100644
--- a/drivers/usb/gadget/function/f_fs.c
+++ b/drivers/usb/gadget/function/f_fs.c
@@ -690,32 +690,24 @@ static ssize_t ffs_epfile_io(struct file *file, struct ffs_io_data *io_data)
 	int halt;
 
 	/* Are we still active? */
-	if (WARN_ON(epfile->ffs->state != FFS_ACTIVE)) {
-		ret = -ENODEV;
-		goto error;
-	}
+	if (WARN_ON(epfile->ffs->state != FFS_ACTIVE))
+		return -ENODEV;
 
 	/* Wait for endpoint to be enabled */
 	ep = epfile->ep;
 	if (!ep) {
-		if (file->f_flags & O_NONBLOCK) {
-			ret = -EAGAIN;
-			goto error;
-		}
+		if (file->f_flags & O_NONBLOCK)
+			return -EAGAIN;
 
 		ret = wait_event_interruptible(epfile->wait, (ep = epfile->ep));
-		if (ret) {
-			ret = -EINTR;
-			goto error;
-		}
+		if (ret)
+			return -EINTR;
 	}
 
 	/* Do we halt? */
 	halt = (!io_data->read == !epfile->in);
-	if (halt && epfile->isoc) {
-		ret = -EINVAL;
-		goto error;
-	}
+	if (halt && epfile->isoc)
+		return -EINVAL;
 
 	/* Allocate & copy */
 	if (!halt) {
-- 
2.6.0.rc2.230.g3dd15c0

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