[PATCH 2/3] staging: wilc1000: One function call less in mac_ioctl() after error detection

[SF Markus Elfring <elfring@users.sourceforge.net>]

From: Markus Elfring <elfring@users.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@users.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