[PATCH] Add power management op for RNDIS host

[PATCH] Add power management op for RNDIS host

[Ivanl S]

From bf417c9c1c22f8d335ec361d6fb5759fd167733a Mon Sep 17 00:00:00 2001
From bf417c9c1c22f8d335ec361d6fb5759fd167733a Mon Sep 17 00:00:00 2001
From: Shaoxu Liu <shaoxu.liu@telit.com> Date: Tue, 19 May 2026
13:49:06 +0800 Subject: [PATCH] Add power management op for RNDIS host
RNDIS host does not manage the USB power, and it will cause more power
consumption even when no data transferring. Adding the power
management operator will make the USB enter suspend mode when no data
transferring. --- drivers/net/usb/rndis_host.c | 16 ++++++++++++++++ 1
file changed, 16 insertions(+) diff --git
a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c index
7b3739b29..76eb65fd5 100644 --- a/drivers/net/usb/rndis_host.c +++
b/drivers/net/usb/rndis_host.c @@ -630,6 +630,17 @@ static const
struct driver_info zte_rndis_info = { .tx_fixup = rndis_tx_fixup, };
+static const struct driver_info rndis_info_lowpower = { +
.description = "RNDIS device", + .flags = FLAG_ETHER |
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, +
.manage_power = usbnet_manage_power, +}; +
/*-------------------------------------------------------------------------*/
static const struct usb_device_id products [] = { @@ -657,6 +668,11 @@
static const struct usb_device_id products [] = { /* RNDIS is MSFT's
un-official variant of CDC ACM */ USB_INTERFACE_INFO(USB_CLASS_COMM, 2
/* ACM */, 0x0ff), .driver_info = (unsigned long) &rndis_info, +}, { +
/* RNDIS for Telit Cinterion low power LTE cat1biz modules LE310X1*/ +
USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x7030, +
USB_CLASS_WIRELESS_CONTROLLER, 1, 3), + .driver_info = (unsigned
long)&rndis_info_lowpower, }, { /* "ActiveSync" is an undocumented
variant of RNDIS, used in WM5 */ USB_INTERFACE_INFO(USB_CLASS_MISC, 1,
1), -- 2.25.1 Signed-off-by: Shaoxu Liu <shaoxul@gmail.com>

Re: [PATCH] Add power management op for RNDIS host

[Greg KH]

On Tue, May 19, 2026 at 03:28:14PM +0800, Ivanl S wrote:
> >From bf417c9c1c22f8d335ec361d6fb5759fd167733a Mon Sep 17 00:00:00 2001
> >From bf417c9c1c22f8d335ec361d6fb5759fd167733a Mon Sep 17 00:00:00 2001
> From: Shaoxu Liu <shaoxu.liu@telit.com> Date: Tue, 19 May 2026
> 13:49:06 +0800 Subject: [PATCH] Add power management op for RNDIS host
> RNDIS host does not manage the USB power, and it will cause more power
> consumption even when no data transferring. Adding the power
> management operator will make the USB enter suspend mode when no data
> transferring. --- drivers/net/usb/rndis_host.c | 16 ++++++++++++++++ 1
> file changed, 16 insertions(+) diff --git
> a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c index
> 7b3739b29..76eb65fd5 100644 --- a/drivers/net/usb/rndis_host.c +++
> b/drivers/net/usb/rndis_host.c @@ -630,6 +630,17 @@ static const
> struct driver_info zte_rndis_info = { .tx_fixup = rndis_tx_fixup, };
> +static const struct driver_info rndis_info_lowpower = { +
> .description = "RNDIS device", + .flags = FLAG_ETHER |
> 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, +
> .manage_power = usbnet_manage_power, +}; +
> /*-------------------------------------------------------------------------*/
> static const struct usb_device_id products [] = { @@ -657,6 +668,11 @@
> static const struct usb_device_id products [] = { /* RNDIS is MSFT's
> un-official variant of CDC ACM */ USB_INTERFACE_INFO(USB_CLASS_COMM, 2
> /* ACM */, 0x0ff), .driver_info = (unsigned long) &rndis_info, +}, { +
> /* RNDIS for Telit Cinterion low power LTE cat1biz modules LE310X1*/ +
> USB_DEVICE_AND_INTERFACE_INFO(0x1bc7, 0x7030, +
> USB_CLASS_WIRELESS_CONTROLLER, 1, 3), + .driver_info = (unsigned
> long)&rndis_info_lowpower, }, { /* "ActiveSync" is an undocumented
> variant of RNDIS, used in WM5 */ USB_INTERFACE_INFO(USB_CLASS_MISC, 1,
> 1), -- 2.25.1 Signed-off-by: Shaoxu Liu <shaoxul@gmail.com>
> 

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