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Date: Tue, 14 Jul 2020 21:26:53 -0400 From: Wxcafé <wxcafe@...afe.net> To: linux-usb@...r.kernel.org Cc: Miguel Rodríguez Pérez <miguel@....uvigo.gal>, oliver@...kum.org, netdev@...r.kernel.org Subject: [PATCH 3/4] cdc_ncm: replace the way cdc_ncm hooks into usbnet_change_mtu Previously cdc_ncm overwrited netdev_ops used by usbnet thus preventing hooking into set_rx_mode. This patch preserves usbnet hooks into netdev_ops, and add an additional one for change_mtu needed by cdc_ncm. Signed-off-by: Miguel Rodríguez Pérez <miguel@....uvigo.gal> --- drivers/net/usb/cdc_ncm.c | 13 +++---------- 1 file changed, 3 insertions(+), 10 deletions(-) diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index 8929669b5e6d..2abaf5f8b23b 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -787,16 +787,7 @@ int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) } EXPORT_SYMBOL_GPL(cdc_ncm_change_mtu); -static const struct net_device_ops cdc_ncm_netdev_ops = { - .ndo_open = usbnet_open, - .ndo_stop = usbnet_stop, - .ndo_start_xmit = usbnet_start_xmit, - .ndo_tx_timeout = usbnet_tx_timeout, - .ndo_get_stats64 = usbnet_get_stats64, - .ndo_change_mtu = cdc_ncm_change_mtu, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, -}; +static struct net_device_ops cdc_ncm_netdev_ops; int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_altsetting, int drvflags) { @@ -953,6 +944,8 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_ dev->net->sysfs_groups[0] = &cdc_ncm_sysfs_attr_group; /* must handle MTU changes */ + cdc_ncm_netdev_ops = *dev->net->netdev_ops; + cdc_ncm_netdev_ops.ndo_change_mtu = cdc_ncm_change_mtu; dev->net->netdev_ops = &cdc_ncm_netdev_ops; dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); -- 2.27.0 -- Wxcafé <wxcafe@...afe.net>
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