[PATCH 1/2] usbnet: add new flag FLAG_NOARP for usb net devices

[PATCH 1/2] usbnet: add new flag FLAG_NOARP for usb net devices

[Wei Shuai]

We do have some USB net devices, which cannot do ARP. 
so we can introduce a new flag FLAG_NOARP, then client drivers 
can easily handle this kind of devices


Signed-off-by: Wei Shuai <cpuwolf@gmail.com>
---
 drivers/net/usb/usbnet.c   |    4 ++++
 include/linux/usb/usbnet.h |    1 +
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 3d4bf01..f34b2eb 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1448,6 +1448,10 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod)
 		if ((dev->driver_info->flags & FLAG_WWAN) != 0)
 			strcpy(net->name, "wwan%d");
 
+		/* devices that cannot do ARP */
+		if ((dev->driver_info->flags & FLAG_NOARP) != 0)
+			net->flags |= IFF_NOARP;
+
 		/* maybe the remote can't receive an Ethernet MTU */
 		if (net->mtu > (dev->hard_mtu - net->hard_header_len))
 			net->mtu = dev->hard_mtu - net->hard_header_len;
diff --git a/include/linux/usb/usbnet.h b/include/linux/usb/usbnet.h
index bd45eb7..5de7a22 100644
--- a/include/linux/usb/usbnet.h
+++ b/include/linux/usb/usbnet.h
@@ -100,6 +100,7 @@ struct driver_info {
 #define FLAG_LINK_INTR	0x0800		/* updates link (carrier) status */
 
 #define FLAG_POINTTOPOINT 0x1000	/* possibly use "usb%d" names */
+#define FLAG_NOARP	0x2000		/* device can't do ARP */
 
 /*
  * Indicates to usbnet, that USB driver accumulates multiple IP packets.
-- 
1.7.6.5

[PATCH 2/2] cdc_ncm: add support FLAG_NOARP for Infineon modem platform

[Wei Shuai]

Infineon(now Intel) HSPA Modem platform NCM cannot support ARP.
we can define a new common structure wwan_noarp_info.
Then more similiar NO ARP devices can be handled easily


Signed-off-by: Wei Shuai <cpuwolf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/net/usb/cdc_ncm.c |   21 +++++++++++++++++++++
 1 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 71b6e92..2d699b6 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -1155,6 +1155,20 @@ static const struct driver_info wwan_info = {
 	.tx_fixup = cdc_ncm_tx_fixup,
 };
 
+/* Same as wwan_info, but with FLAG_NOARP  */
+static const struct driver_info wwan_noarp_info = {
+	.description = "Mobile Broadband Network Device (NO ARP)",
+	.flags = FLAG_POINTTOPOINT | FLAG_NO_SETINT | FLAG_MULTI_PACKET
+			| FLAG_WWAN | FLAG_NOARP,
+	.bind = cdc_ncm_bind,
+	.unbind = cdc_ncm_unbind,
+	.check_connect = cdc_ncm_check_connect,
+	.manage_power = usbnet_manage_power,
+	.status = cdc_ncm_status,
+	.rx_fixup = cdc_ncm_rx_fixup,
+	.tx_fixup = cdc_ncm_tx_fixup,
+};
+
 static const struct usb_device_id cdc_devs[] = {
 	/* Ericsson MBM devices like F5521gw */
 	{ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO
@@ -1194,6 +1208,13 @@ static const struct usb_device_id cdc_devs[] = {
 	  .driver_info = (unsigned long)&wwan_info,
 	},
 
+	/* Infineon(now Intel) HSPA Modem platform */
+	{ USB_DEVICE_AND_INTERFACE_INFO(0x1519, 0x0443,
+		USB_CLASS_COMM,
+		USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
+	  .driver_info = (unsigned long)&wwan_noarp_info,
+	},
+
 	/* Generic CDC-NCM devices */
 	{ USB_INTERFACE_INFO(USB_CLASS_COMM,
 		USB_CDC_SUBCLASS_NCM, USB_CDC_PROTO_NONE),
-- 
1.7.6.5

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Re: [PATCH 1/2] usbnet: add new flag FLAG_NOARP for usb net devices

[David Miller]

From: Wei Shuai <cpuwolf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date: Tue, 22 Jan 2013 00:00:31 +0800

> We do have some USB net devices, which cannot do ARP. 
> so we can introduce a new flag FLAG_NOARP, then client drivers 
> can easily handle this kind of devices
> 
> Signed-off-by: Wei Shuai <cpuwolf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Applied.
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Re: [PATCH 2/2] cdc_ncm: add support FLAG_NOARP for Infineon modem platform

[David Miller]

From: Wei Shuai <cpuwolf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date: Tue, 22 Jan 2013 00:00:32 +0800

> Infineon(now Intel) HSPA Modem platform NCM cannot support ARP.
> we can define a new common structure wwan_noarp_info.
> Then more similiar NO ARP devices can be handled easily
> 
> Signed-off-by: Wei Shuai <cpuwolf-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>

Applied.
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