netdev - Re: [PATCH] net: sh_eth: Fix RX packets errors on R8A7740

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Message-ID: <20131009052617.GC16885@verge.net.au>
Date:	Wed, 9 Oct 2013 14:26:17 +0900
From:	Simon Horman <horms@...ge.net.au>
To:	Nguyen Hong Ky <nh-ky@...so.co.jp>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Ryusuke Sakato <ryusuke.sakato.bx@...esas.com>,
	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Subject: Re: [PATCH] net: sh_eth: Fix RX packets errors on R8A7740

On Wed, Oct 09, 2013 at 01:28:26PM +0900, Simon Horman wrote:
> On Mon, Oct 07, 2013 at 03:29:25PM +0900, Nguyen Hong Ky wrote:
> > This patch will fix RX packets errors when receiving big size
> > of data by set bit RNC = 1.
> > 
> > RNC - Receive Enable Control
> > 
> > 0: Upon completion of reception of one frame, the E-DMAC writes
> > the receive status to the descriptor and clears the RR bit in
> > EDRRR to 0.
> > 
> > 1: Upon completion of reception of one frame, the E-DMAC writes
> > (writes back) the receive status to the descriptor. In addition,
> > the E-DMAC reads the next descriptor and prepares for reception
> > of the next frame.
> > 
> > In addition, for get more stable when receiving packets, I set
> > maximum size for the transmit/receive FIFO and inserts padding
> > in receive data.
> > 
> > Signed-off-by: Nguyen Hong Ky <nh-ky@...so.co.jp>
> 
> I realise that this patch has been applied but regardless
> I would like to acknowledge that it resolve a problem that
> I observed this afternoon.
> 
> Without this patch I see the following on the console, many times:
> 
> net eth0: Receive FIFO Overflow
> 
> With this patch I do not see the warning message at all.

Scratch that, I am still seeing the messages with this patch applied.
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