net: usb: qmi_wwan: restore mtu min/max values after raw_ip switch
[ Upstream commit eae7172f81
]
usbnet creates network interfaces with min_mtu = 0 and
max_mtu = ETH_MAX_MTU.
These values are not modified by qmi_wwan when the network interface
is created initially, allowing, for example, to set mtu greater than 1500.
When a raw_ip switch is done (raw_ip set to 'Y', then set to 'N') the mtu
values for the network interface are set through ether_setup, with
min_mtu = ETH_MIN_MTU and max_mtu = ETH_DATA_LEN, not allowing anymore to
set mtu greater than 1500 (error: mtu greater than device maximum).
The patch restores the original min/max mtu values set by usbnet after a
raw_ip switch.
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: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
6c663120ec
commit
d939f3389f
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@ -337,6 +337,9 @@ static void qmi_wwan_netdev_setup(struct net_device *net)
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netdev_dbg(net, "mode: raw IP\n");
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} else if (!net->header_ops) { /* don't bother if already set */
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ether_setup(net);
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/* Restoring min/max mtu values set originally by usbnet */
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net->min_mtu = 0;
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net->max_mtu = ETH_MAX_MTU;
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clear_bit(EVENT_NO_IP_ALIGN, &dev->flags);
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netdev_dbg(net, "mode: Ethernet\n");
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}
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