From: Vasyl Gomonovych <gomonovych@gmail.com>
Date: Wed, 22 Nov 2017 15:29:57 +0000 (+0100)
Subject: lmc: Use memdup_user() as a cleanup
X-Git-Tag: microblaze-4.16-rc1~233^2~18
X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=f95d5bf03b5ec0d7ea8e552e15abe70c646249b5;p=linux-2.6-microblaze.git

lmc: Use memdup_user() as a cleanup

Fix coccicheck warning which recommends to use memdup_user():
drivers/net/wan/lmc/lmc_main.c:497:27-34: WARNING opportunity for memdup_user
Generated by: scripts/coccinelle/memdup_user/memdup_user.cocci

Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/wan/lmc/lmc_main.c b/drivers/net/wan/lmc/lmc_main.c
index 37b1e0d03e31..90a4ad9a2d08 100644
--- a/drivers/net/wan/lmc/lmc_main.c
+++ b/drivers/net/wan/lmc/lmc_main.c
@@ -494,18 +494,11 @@ int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
                             break;
                     }
 
-                    data = kmalloc(xc.len, GFP_KERNEL);
-                    if (!data) {
-                            ret = -ENOMEM;
+                    data = memdup_user(xc.data, xc.len);
+                    if (IS_ERR(data)) {
+                            ret = PTR_ERR(data);
                             break;
                     }
-                    
-                    if(copy_from_user(data, xc.data, xc.len))
-                    {
-                    	kfree(data);
-                    	ret = -ENOMEM;
-                    	break;
-                    }
 
                     printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data);