From 871ff2ebe0af0d7f1050bfc8bce62fddea2b12ec Mon Sep 17 00:00:00 2001 From: Geliang Tang Date: Sat, 6 May 2017 23:42:22 +0800 Subject: yam: use memdup_user Use memdup_user() helper instead of open-coding to simplify the code. Signed-off-by: Geliang Tang Signed-off-by: David S. Miller --- drivers/net/hamradio/yam.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'drivers/net/hamradio/yam.c') diff --git a/drivers/net/hamradio/yam.c b/drivers/net/hamradio/yam.c index b6891ada1d7b..7a7c5224a336 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; -- cgit v1.2.3-59-g8ed1b