yam: use memdup_user
Use memdup_user() helper instead of open-coding to simplify the code.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c
index b6891ad..7a7c522 100644
--- a/drivers/net/hamradio/yam.c
+++ b/drivers/net/hamradio/yam.c
@@ -976,12 +976,10 @@ static int yam_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
case SIOCYAMSMCS:
if (netif_running(dev))
return -EINVAL; /* Cannot change this parameter when up */
- if ((ym = kmalloc(sizeof(struct yamdrv_ioctl_mcs), GFP_KERNEL)) == NULL)
- return -ENOBUFS;
- if (copy_from_user(ym, ifr->ifr_data, sizeof(struct yamdrv_ioctl_mcs))) {
- kfree(ym);
- return -EFAULT;
- }
+ ym = memdup_user(ifr->ifr_data,
+ sizeof(struct yamdrv_ioctl_mcs));
+ if (IS_ERR(ym))
+ return PTR_ERR(ym);
if (ym->bitrate > YAM_MAXBITRATE) {
kfree(ym);
return -EINVAL;