netdev - Re: [PATCH V2 1/1] net: cdc_ncm: Fix TX zero padding

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Message-Id: <20170508.160148.1055084315233926966.davem@davemloft.net>
Date:   Mon, 08 May 2017 16:01:48 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     jim_baxter@...tor.com
Cc:     linux-usb@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, oliver@...kum.org
Subject: Re: [PATCH V2 1/1] net: cdc_ncm: Fix TX zero padding

From: Jim Baxter <jim_baxter@...tor.com>
Date: Mon, 8 May 2017 13:49:57 +0100

> The zero padding that is added to NTB's does
> not zero the memory correctly.
> This is because the skb_put modifies the value
> of skb_out->len which results in the memset
> command not setting any memory to zero as
> (ctx->tx_max - skb_out->len) == 0.
> 
> I have resolved this by storing the size of
> the memory to be zeroed before the skb_put
> and using this in the memset call.
> 
> Signed-off-by: Jim Baxter <jim_baxter@...tor.com>
> Reviewed-by: Bjørn Mork <bjorn@...k.no>

Applied, thank you.