From: Macpaul Lin <macpaul@gmail.com>
Date: Tue, 15 Apr 2014 08:09:33 +0000 (+0800)
Subject: usb: gadget: f_rndis: reduce NETTX irq caused by free skb header
X-Git-Tag: v3.15-rc3~10^2~20^2~1
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=2656c9e28125e96bee212f146cc3f2419fd3ffef;p=linux.git

usb: gadget: f_rndis: reduce NETTX irq caused by free skb header

This patch reduce unecessary NETTX softirq call caused by
free skb header. You will see this softirq comes twice while
there is only one TX packet to be transmitted.

So using dev_kfree_skb() instead of dev_kfree_skb_any() to
avoid this problem.

Cc: David S. Miller <davem@davemloft.net>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Macpaul Lin <macpaul@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/gadget/f_rndis.c b/drivers/usb/gadget/f_rndis.c
index c11761ce5113..9a4f49dc6ac4 100644
--- a/drivers/usb/gadget/f_rndis.c
+++ b/drivers/usb/gadget/f_rndis.c
@@ -377,7 +377,7 @@ static struct sk_buff *rndis_add_header(struct gether *port,
 	if (skb2)
 		rndis_add_hdr(skb2);
 
-	dev_kfree_skb_any(skb);
+	dev_kfree_skb(skb);
 	return skb2;
 }