[firefly] [PATCH] staging: rtl8192e: use memdup_user instead of kmalloc+copy_from_user

[Teodora Baluta]

Use memdup_user rather than duplicating its implementation. This patch
fixes the following coccinelle warnings:

drivers/staging/rtl8192e/rtl8192e/rtl_core.c:2598:8-15: WARNING opportunity for memdup_user
drivers/staging/rtl8192e/rtllib_softmac.c:3594:9-16: WARNING opportunity for memdup_user

Signed-off-by: Teodora Baluta <teobaluta at gmail.com>
---
 drivers/staging/rtl8192e/rtl8192e/rtl_core.c |   12 ++++--------
 drivers/staging/rtl8192e/rtllib_softmac.c    |   12 ++++--------
 2 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
index b01f6f5..2d84f31 100644
--- a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
+++ b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
@@ -2595,14 +2595,10 @@ static int rtl8192_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 			goto out;
 		}
 
-		ipw = kmalloc(p->length, GFP_KERNEL);
-		if (ipw == NULL) {
-			ret = -ENOMEM;
-			goto out;
-		}
-		if (copy_from_user(ipw, p->pointer, p->length)) {
-			kfree(ipw);
-			ret = -EFAULT;
+		ipw = memdup_user(p->pointer, p->length);
+
+		if (IS_ERR(ipw)) {
+			ret = PTR_ERR(ipw);
 			goto out;
 		}
 
diff --git a/drivers/staging/rtl8192e/rtllib_softmac.c b/drivers/staging/rtl8192e/rtllib_softmac.c
index 0cbf6f5..e9463a5 100644
--- a/drivers/staging/rtl8192e/rtllib_softmac.c
+++ b/drivers/staging/rtl8192e/rtllib_softmac.c
@@ -3591,14 +3591,10 @@ int rtllib_wpa_supplicant_ioctl(struct rtllib_device *ieee, struct iw_point *p,
 		goto out;
 	}
 
-	param = kmalloc(p->length, GFP_KERNEL);
-	if (param == NULL) {
-		ret = -ENOMEM;
-		goto out;
-	}
-	if (copy_from_user(param, p->pointer, p->length)) {
-		kfree(param);
-		ret = -EFAULT;
+	param = memdup_user(p->pointer, p->length);
+
+	if (IS_ERR(param)) {
+		ret = PTR_ERR(param);
 		goto out;
 	}
 
-- 
1.7.10.4