staging: rtl8192u: use memdup_user to simplify code

Use memdup_user rather than duplicating its implementation. Fix the
following coccinelle warnings:

drivers/staging/rtl8192u/r8192U_core.c:3792:7-14: WARNING opportunity for memdup_user
drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c:3153:9-16: WARNING opportunity for memdup_user

Signed-off-by: Teodora Baluta <teobaluta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
index 5fd6969..662c7e4 100644 (file)
--- a/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
+++ b/drivers/staging/rtl8192u/ieee80211/ieee80211_softmac.c
@@ -3150,14 +3150,9 @@ int ieee80211_wpa_supplicant_ioctl(struct ieee80211_device *ieee, struct iw_poin
                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;
        }
 

diff --git a/drivers/staging/rtl8192u/r8192U_core.c b/drivers/staging/rtl8192u/r8192U_core.c
index 63a4cdf..c2bcbe2 100644 (file)
--- a/drivers/staging/rtl8192u/r8192U_core.c
+++ b/drivers/staging/rtl8192u/r8192U_core.c
@@ -3789,14 +3789,9 @@ 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;
        }