linux-kernel - [PATCH] staging: rtl8723bs: remove memset before memcpy

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Date:   Mon, 28 Aug 2017 01:43:31 +0530
From:   Himanshu Jha <himanshujha199640@...il.com>
To:     gregkh@...uxfoundation.org
Cc:     insafonov@...il.com, hdegoede@...hat.com,
        Larry.Finger@...inger.net, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org,
        Himanshu Jha <himanshujha199640@...il.com>
Subject: [PATCH] staging: rtl8723bs: remove memset before memcpy

calling memcpy immediately after memset with the same region of memory
makes memset redundant.

Build successfully.

Signed-off-by: Himanshu Jha <himanshujha199640@...il.com>
---
 drivers/staging/rtl8723bs/core/rtw_ioctl_set.c | 1 -
 drivers/staging/rtl8723bs/core/rtw_mlme.c      | 2 --
 drivers/staging/rtl8723bs/os_dep/mlme_linux.c  | 2 --
 3 files changed, 5 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_ioctl_set.c b/drivers/staging/rtl8723bs/core/rtw_ioctl_set.c
index e0793f8..d815a69 100644
--- a/drivers/staging/rtl8723bs/core/rtw_ioctl_set.c
+++ b/drivers/staging/rtl8723bs/core/rtw_ioctl_set.c
@@ -127,7 +127,6 @@ u8 rtw_do_join(struct adapter *padapter)
 
 				pibss = padapter->registrypriv.dev_network.MacAddress;
 
-				memset(&pdev_network->Ssid, 0, sizeof(struct ndis_802_11_ssid));
 				memcpy(&pdev_network->Ssid, &pmlmepriv->assoc_ssid, sizeof(struct ndis_802_11_ssid));
 
 				rtw_update_registrypriv_dev_network(padapter);
diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c
index 9f44dd0..6b77820 100644
--- a/drivers/staging/rtl8723bs/core/rtw_mlme.c
+++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c
@@ -922,7 +922,6 @@ void rtw_surveydone_event_callback(struct adapter	*adapter, u8 *pbuf)
 
 					RT_TRACE(_module_rtl871x_mlme_c_, _drv_err_, ("switching to adhoc master\n"));
 
-					memset(&pdev_network->Ssid, 0, sizeof(struct ndis_802_11_ssid));
 					memcpy(&pdev_network->Ssid, &pmlmepriv->assoc_ssid, sizeof(struct ndis_802_11_ssid));
 
 					rtw_update_registrypriv_dev_network(adapter);
@@ -1774,7 +1773,6 @@ void rtw_stadel_event_callback(struct adapter *adapter, u8 *pbuf)
 
 			memcpy(pdev_network, &tgt_network->network, get_wlan_bssid_ex_sz(&tgt_network->network));
 
-			memset(&pdev_network->Ssid, 0, sizeof(struct ndis_802_11_ssid));
 			memcpy(&pdev_network->Ssid, &pmlmepriv->assoc_ssid, sizeof(struct ndis_802_11_ssid));
 
 			rtw_update_registrypriv_dev_network(adapter);
diff --git a/drivers/staging/rtl8723bs/os_dep/mlme_linux.c b/drivers/staging/rtl8723bs/os_dep/mlme_linux.c
index 46315d1..3e29df0 100644
--- a/drivers/staging/rtl8723bs/os_dep/mlme_linux.c
+++ b/drivers/staging/rtl8723bs/os_dep/mlme_linux.c
@@ -91,8 +91,6 @@ void rtw_reset_securitypriv(struct adapter *adapter)
 		/*  Backup the btkip_countermeasure information. */
 		/*  When the countermeasure is trigger, the driver have to disconnect with AP for 60 seconds. */
 
-		memset(&backupPMKIDList[ 0 ], 0x00, sizeof(RT_PMKID_LIST) * NUM_PMKID_CACHE);
-
 		memcpy(&backupPMKIDList[ 0 ], &adapter->securitypriv.PMKIDList[ 0 ], sizeof(RT_PMKID_LIST) * NUM_PMKID_CACHE);
 		backupPMKIDIndex = adapter->securitypriv.PMKIDIndex;
 		backupTKIPCountermeasure = adapter->securitypriv.btkip_countermeasure;
-- 
2.7.4