linux-kernel - Re: [PATCH V2 net 1/1] hv_netvsc: Fix a bug in netvsc_start

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Message-Id: <20150429.152126.847523297244536648.davem@davemloft.net>
Date:	Wed, 29 Apr 2015 15:21:26 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	kys@...rosoft.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
	jasowang@...hat.com
Subject: Re: [PATCH V2 net 1/1] hv_netvsc: Fix a bug in netvsc_start_xmit()

From: "K. Y. Srinivasan" <kys@...rosoft.com>
Date: Tue, 28 Apr 2015 17:59:48 -0700

> Commit b08cc79155fc26d0d112b1470d1ece5034651a4b eliminated memory
> allocation in the packet send path:
> 
>     "hv_netvsc: Eliminate memory allocation in the packet send path
> 
>     The network protocol used to communicate with the host is the remote ndis (rndis)
>     protocol. We need to decorate each outgoing packet with a rndis header and
>     additional rndis state (rndis per-packet state). To manage this state, we
>     currently allocate memory in the transmit path. Eliminate this allocation by
>     requesting additional head room in the skb."
> 
> This commit introduced a bug since it did not account for the case if the skb
> was cloned. Fix this bug.
> 
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>

Applied, thanks.
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