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

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commit 6c59cff38e66584ae3ac6c2f0cbd8d039c710ba7 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Daniele Palmas 2021-03-04 14:15:13 +01:00 committed by Greg Kroah-Hartman
parent 565b2d3ae2
commit 6ed0a2cafd
1 changed files with 0 additions and 14 deletions
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14
drivers/net/usb/qmi_wwan.c
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@ -419,13 +419,6 @@ 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;
@ -455,13 +448,6 @@ 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");