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phonet: use siocdevprivate

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phonet has a single private ioctl that is broken in compat
mode on big-endian machines today because the data returned
from it is never copied back to user space.

Move it over to the ndo_siocdevprivate callback, which also
fixes the compat issue.

Cc: Remi Denis-Courmont <courmisch@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Rémi Denis-Courmont <courmisch@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2021-07-27 15:44:52 +02:00 committed by David S. Miller
parent 561d835281
commit 4747c1a8bc
2 changed files with 6 additions and 5 deletions
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5
drivers/net/usb/cdc-phonet.c
View File

@ -253,7 +253,8 @@ static int usbpn_close(struct net_device *dev)
return usb_set_interface(pnd->usb, num, !pnd->active_setting);
}
static int usbpn_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
static int usbpn_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
void __user *data, int cmd)
{
struct if_phonet_req *req = (struct if_phonet_req *)ifr;
@ -269,7 +270,7 @@ static const struct net_device_ops usbpn_ops = {
.ndo_open = usbpn_open,
.ndo_stop = usbpn_close,
.ndo_start_xmit = usbpn_xmit,
.ndo_do_ioctl = usbpn_ioctl,
.ndo_siocdevprivate = usbpn_siocdevprivate,
};
static void usbpn_setup(struct net_device *dev)

6
net/phonet/pn_dev.c
View File

@ -233,11 +233,11 @@ static int phonet_device_autoconf(struct net_device *dev)
struct if_phonet_req req;
int ret;
if (!dev->netdev_ops->ndo_do_ioctl)
if (!dev->netdev_ops->ndo_siocdevprivate)
return -EOPNOTSUPP;
ret = dev->netdev_ops->ndo_do_ioctl(dev, (struct ifreq *)&req,
SIOCPNGAUTOCONF);
ret = dev->netdev_ops->ndo_siocdevprivate(dev, (struct ifreq *)&req,
NULL, SIOCPNGAUTOCONF);
if (ret < 0)
return ret;