From: Lubomir Rintel Date: Tue, 25 Mar 2025 09:58:41 +0000 (+0100) Subject: rndis_host: Flag RNDIS modems as WWAN devices X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=67d1a8956d2d62fe6b4c13ebabb57806098511d8;p=users%2Fjedix%2Flinux-maple.git rndis_host: Flag RNDIS modems as WWAN devices Set FLAG_WWAN instead of FLAG_ETHERNET for RNDIS interfaces on Mobile Broadband Modems, as opposed to regular Ethernet adapters. Otherwise NetworkManager gets confused, misjudges the device type, and wouldn't know it should connect a modem to get the device to work. What would be the result depends on ModemManager version -- older ModemManager would end up disconnecting a device after an unsuccessful probe attempt (if it connected without needing to unlock a SIM), while a newer one might spawn a separate PPP connection over a tty interface instead, resulting in a general confusion and no end of chaos. The only way to get this work reliably is to fix the device type and have good enough version ModemManager (or equivalent). Fixes: 63ba395cd7a5 ("rndis_host: support Novatel Verizon USB730L") Signed-off-by: Lubomir Rintel Link: https://patch.msgid.link/20250325095842.1567999-1-lkundrak@v3.sk Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c index 7b3739b29c8f..bb0bf1415872 100644 --- a/drivers/net/usb/rndis_host.c +++ b/drivers/net/usb/rndis_host.c @@ -630,6 +630,16 @@ static const struct driver_info zte_rndis_info = { .tx_fixup = rndis_tx_fixup, }; +static const struct driver_info wwan_rndis_info = { + .description = "Mobile Broadband RNDIS device", + .flags = FLAG_WWAN | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, + .bind = rndis_bind, + .unbind = rndis_unbind, + .status = rndis_status, + .rx_fixup = rndis_rx_fixup, + .tx_fixup = rndis_tx_fixup, +}; + /*-------------------------------------------------------------------------*/ static const struct usb_device_id products [] = { @@ -666,9 +676,11 @@ static const struct usb_device_id products [] = { USB_INTERFACE_INFO(USB_CLASS_WIRELESS_CONTROLLER, 1, 3), .driver_info = (unsigned long) &rndis_info, }, { - /* Novatel Verizon USB730L */ + /* Mobile Broadband Modem, seen in Novatel Verizon USB730L and + * Telit FN990A (RNDIS) + */ USB_INTERFACE_INFO(USB_CLASS_MISC, 4, 1), - .driver_info = (unsigned long) &rndis_info, + .driver_info = (unsigned long)&wwan_rndis_info, }, { }, // END };