netdev - Re: [PATCH resend] can: c_can: Fix tx

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Date:	Thu, 24 Mar 2011 11:49:25 +0100
From:	Kurt Van Dijck <kurt.van.dijck@....be>
To:	Jan Altenberg <jan@...utronix.de>
Cc:	Wolfgang Grandegger <wg@...ndegger.com>,
	Bhupesh SHARMA <bhupesh.sharma@...com>,
	"b.spranger@...utronix.de" <b.spranger@...utronix.de>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"Socketcan-core@...ts.berlios.de" <Socketcan-core@...ts.berlios.de>
Subject: Re: [PATCH resend] can: c_can: Fix tx_bytes accounting

On Thu, Mar 24, 2011 at 12:26:50PM +0100, Jan Altenberg wrote:
> The current SocketCAN implementation for the Bosch c_can cell doesn't
> account the TX bytes correctly, because it calls
> c_can_inval_msg_object() (which clears the msg ctrl register) before
> reading the DLC value:
> 
> The fix is quite easy: Just move c_can_inval_msg_object() to the end of
> the if() statement. So:
>       * We only call c_can_inval_msg_object() if the message was
>         actually transmitted
>       * We read out the DLC value _before_ clearing the msg ctrl
>         register
> 
> Signed-off-by: Jan Altenberg <jan@...utronix.de>
Acked-by: Kurt Van Dijck <kurt.van.dijck@....be>

I cut the description a bit, to what I would have found sufficient.
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