linux-kernel - [PATCH 2/3] staging: wilc1000: One function call less in mac

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Date:	Sun, 24 Jul 2016 22:22:06 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	linux-wireless@...r.kernel.org, devel@...verdev.osuosl.org,
	Austin Shin <austin.shin@...el.com>,
	Chris Park <chris.park@...el.com>,
	Glen Lee <glen.lee@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Johnny Kim <johnny.kim@...el.com>, Leo Kim <leo.kim@...el.com>,
	Tony Cho <tony.cho@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 2/3] staging: wilc1000: One function call less in mac_ioctl()
 after error detection

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 24 Jul 2016 21:15:23 +0200

The kfree() function was called in two cases by the mac_ioctl() function
during error handling even if the passed variable did not contain a pointer
for a valid data item.

Improve this implementation detail by the introduction of another
jump label.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/staging/wilc1000/linux_wlan.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c
index cdef645..7b1ebcc 100644
--- a/drivers/staging/wilc1000/linux_wlan.c
+++ b/drivers/staging/wilc1000/linux_wlan.c
@@ -1130,7 +1130,7 @@ static int mac_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
 				if (copy_to_user(wrq->u.data.pointer, buff, size)) {
 					netdev_err(ndev, "failed to copy\n");
 					ret = -EFAULT;
-					goto done;
+					goto free_buffer;
 				}
 			}
 		}
@@ -1144,11 +1144,9 @@ static int mac_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
 		goto done;
 	}
 	}
-
-done:
-
+free_buffer:
 	kfree(buff);
-
+done:
 	return ret;
 }
 
-- 
2.9.2