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From:   Shreeya Patel <shreeya.patel23498@gmail.com>
To:     adham.abozaeid@microchip.com, ajay.kathat@microchip.com,
        linux-wireless@vger.kernel.org, gregkh@linuxfoundation.org,
        devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org,
        outreachy-kernel@googlegroups.com, sbrivio@redhat.com,
        daniel.baluta@gmail.com, nramas@linux.microsoft.com,
        hverkuil@xs4all.nl, shreeya.patel23498@gmail.com
Subject: [Outreachy kernel] [PATCH] Staging: wilc1000: cfg80211: Use kmemdup instead of kmalloc and memcpy
Date:   Fri, 13 Mar 2020 16:54:51 +0530
Message-Id: <20200313112451.25610-1-shreeya.patel23498@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Replace calls to kmalloc followed by a memcpy with a direct call to
kmemdup.

The Coccinelle semantic patch used to make this change is as follows:
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
---
 drivers/staging/wilc1000/cfg80211.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/wilc1000/cfg80211.c b/drivers/staging/wilc1000/cfg80211.c
index 54e02807cebf..4bdcbc5fd2fd 100644
--- a/drivers/staging/wilc1000/cfg80211.c
+++ b/drivers/staging/wilc1000/cfg80211.c
@@ -1142,14 +1142,13 @@ static int mgmt_tx(struct wiphy *wiphy,
 		goto out;
 	}
 
-	mgmt_tx->buff = kmalloc(len, GFP_KERNEL);
+	mgmt_tx->buff = kmemdup(buf, len, GFP_KERNEL);
 	if (!mgmt_tx->buff) {
 		ret = -ENOMEM;
 		kfree(mgmt_tx);
 		goto out;
 	}
 
-	memcpy(mgmt_tx->buff, buf, len);
 	mgmt_tx->size = len;
 
 	if (ieee80211_is_probe_resp(mgmt->frame_control)) {
-- 
2.17.1