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Date:	Mon, 30 Sep 2013 04:50:07 +0000
From:	Enrico Mioso <>
To:	Oliver Neukum <>,
	Greg Kroah-Hartman <>,
	"David S. Miller" <>,
	Steve Glendinning <>,
	Robert de Vries <>,
	Hayes Wang <>,
	Freddy Xin <>,
	Bjørn Mork <>,
	Liu Junliang <>, (open list), (open list:USB NETWORKING DR...), (open list:NETWORKING DRIVERS),
Cc:	Enrico Mioso <>
Subject: [PATCH V5 net-next 1/3] net: cdc_ncm: Export cdc_ncm_{tx,rx}_fixup functions for re-use

Some drivers implementing NCM-like protocols, may re-use those functions, as is
the case in the huawei_cdc_ncm driver.
Export them via EXPORT_SYMBOL_GPL, in accordance with how other functions have
been exported.

Signed-off-by: Enrico Mioso <>

diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c
index 43afde8..62686be 100644
--- a/drivers/net/usb/cdc_ncm.c
+++ b/drivers/net/usb/cdc_ncm.c
@@ -858,7 +858,7 @@ static void cdc_ncm_txpath_bh(unsigned long param)
-static struct sk_buff *
+struct sk_buff *
 cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
 	struct sk_buff *skb_out;
@@ -885,6 +885,7 @@ error:
 	return NULL;
 /* verify NTB header and return offset of first NDP, or negative error */
 int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in)
@@ -965,7 +966,7 @@ error:
-static int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
+int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in)
 	struct sk_buff *skb;
 	struct cdc_ncm_ctx *ctx = (struct cdc_ncm_ctx *)dev->data[0];
@@ -1040,6 +1041,7 @@ err_ndp:
 	return 0;
 static void
 cdc_ncm_speed_change(struct cdc_ncm_ctx *ctx,
diff --git a/include/linux/usb/cdc_ncm.h b/include/linux/usb/cdc_ncm.h
index cc25b70..163244b 100644
--- a/include/linux/usb/cdc_ncm.h
+++ b/include/linux/usb/cdc_ncm.h
@@ -133,3 +133,6 @@ extern void cdc_ncm_unbind(struct usbnet *dev, struct usb_interface *intf);
 extern struct sk_buff *cdc_ncm_fill_tx_frame(struct cdc_ncm_ctx *ctx, struct sk_buff *skb, __le32 sign);
 extern int cdc_ncm_rx_verify_nth16(struct cdc_ncm_ctx *ctx, struct sk_buff *skb_in);
 extern int cdc_ncm_rx_verify_ndp16(struct sk_buff *skb_in, int ndpoffset);
+struct sk_buff *
+cdc_ncm_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags);
+int cdc_ncm_rx_fixup(struct usbnet *dev, struct sk_buff *skb_in);

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