Return-path: Received: from mout.web.de ([212.227.17.12]:64553 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754126AbbF0Ohg (ORCPT ); Sat, 27 Jun 2015 10:37:36 -0400 Message-ID: <558EB524.1050609@users.sourceforge.net> (sfid-20150627_163755_283960_5B6F0A4F) Date: Sat, 27 Jun 2015 16:37:24 +0200 From: SF Markus Elfring MIME-Version: 1.0 To: Chris Park , Dean Lee , Greg Kroah-Hartman , Johnny Kim , Rachel Kim , linux-wireless@vger.kernel.org, devel@driverdev.osuosl.org CC: LKML , kernel-janitors@vger.kernel.org, Julia Lawall Subject: [PATCH 2/2] staging: wilc1000: One function call less in mac_ioctl() after error detection References: <5307CAA2.8060406@users.sourceforge.net> <530A086E.8010901@users.sourceforge.net> <530A72AA.3000601@users.sourceforge.net> <530B5FB6.6010207@users.sourceforge.net> <530C5E18.1020800@users.sourceforge.net> <530CD2C4.4050903@users.sourceforge.net> <530CF8FF.8080600@users.sourceforge.net> <530DD06F.4090703@users.sourceforge.net> <5317A59D.4@users.sourceforge.net> <558EB32E.6090003@users.sourceforge.net> In-Reply-To: <558EB32E.6090003@users.sourceforge.net> Content-Type: text/plain; charset=windows-1252 Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Markus Elfring Date: Sat, 27 Jun 2015 16:00:59 +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. * This implementation detail could be improved by the introduction of another jump label. * Drop an unnecessary initialisation for the variable "buff" then. Signed-off-by: Markus Elfring --- drivers/staging/wilc1000/linux_wlan.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c index 2aa8d9b..f492310 100644 --- a/drivers/staging/wilc1000/linux_wlan.c +++ b/drivers/staging/wilc1000/linux_wlan.c @@ -2351,16 +2351,13 @@ int mac_close(struct net_device *ndev) int mac_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) { - - u8 *buff = NULL; + u8 *buff; s8 rssi; u32 size = 0, length = 0; perInterface_wlan_t *nic; struct WILC_WFI_priv *priv; s32 s32Error = WILC_SUCCESS; - - /* struct iwreq *wrq = (struct iwreq *) req; // tony moved to case SIOCSIWPRIV */ #ifdef USE_WIRELESS nic = netdev_priv(ndev); @@ -2405,7 +2402,7 @@ int mac_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) if (copy_to_user(wrq->u.data.pointer, buff, size)) { PRINT_ER("%s: failed to copy data to user buffer\n", __func__); s32Error = -EFAULT; - goto done; + goto free_buffer; } } } @@ -2420,8 +2417,9 @@ int mac_ioctl(struct net_device *ndev, struct ifreq *req, int cmd) } } -done: +free_buffer: kfree(buff); +done: return s32Error; } -- 2.4.4