linux-kernel - Re: [PATCH v4 2/2] net: moxa: replace build_skb() with netdev_alloc_skb_ip

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Message-ID: <CACmBeS010Vbgx8wz9YkiQGi4gF6JNQqVRcgYtkCKGqvNs4sopA@mail.gmail.com>
Date:	Mon, 25 Aug 2014 16:23:09 +0200
From:	Jonas Jensen <jonas.jensen@...il.com>
To:	Michał Mirosław <mirqus@...il.com>
Cc:	netdev <netdev@...r.kernel.org>,
	Florian Fainelli <f.fainelli@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: Re: [PATCH v4 2/2] net: moxa: replace build_skb() with
 netdev_alloc_skb_ip_align() / memcpy()

Thanks for giving feedback.

On 21 August 2014 23:43, Michał Mirosław <mirqus@...il.com> wrote:
> This has implicit: if (!skb) BUG(); There should probably be a return
> or continue inside the if (!skb).

Fixed, see v6 update (broken out to separate patch) which now includes
increment to RX head counter

> dma_sync_single_for_device() is not needed here as CPU does not and
> should not write to the DMA_FROM_DEVICE mapping.

Fixed, this was also broken out, dma_sync_single_for_device() moved to TX path.
Maybe someone can verify this is the correct thing to do.


Regards,

   Jonas
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