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net: usb: qmi_wwan: allow qmimux add/del with master up 

There's no reason for preventing the creation and removal
of qmimux network interfaces when the underlying interface
is up.

This makes qmi_wwan mux implementation more similar to the
rmnet one, simplifying userspace management of the same
logical interfaces.

Fixes: c6adf77953 ("net: usb: qmi_wwan: add qmap mux protocol support")
Reported-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Daniele Palmas <dnlplm@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
rM2-mainline
Daniele Palmas 2021-03-04 14:15:13 +01:00 committed by David S. Miller
parent 6a5166e07c
commit 6c59cff38e
1 changed files with 0 additions and 14 deletions
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14
drivers/net/usb/qmi_wwan.c
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@ -429,13 +429,6 @@ static ssize_t add_mux_store(struct device *d, struct device_attribute *attr, c
goto err;
}
/* we don't want to modify a running netdev */
if (netif_running(dev->net)) {
netdev_err(dev->net, "Cannot change a running device\n");
ret = -EBUSY;
goto err;
}
ret = qmimux_register_device(dev->net, mux_id);
if (!ret) {
info->flags |= QMI_WWAN_FLAG_MUX;
@ -465,13 +458,6 @@ static ssize_t del_mux_store(struct device *d, struct device_attribute *attr, c
if (!rtnl_trylock())
return restart_syscall();
/* we don't want to modify a running netdev */
if (netif_running(dev->net)) {
netdev_err(dev->net, "Cannot change a running device\n");
ret = -EBUSY;
goto err;
}
del_dev = qmimux_find_dev(dev, mux_id);
if (!del_dev) {
netdev_err(dev->net, "mux_id not present\n");