netdev - Re: [PATCH v2] can: Add driver for esd CAN-USB/2 device

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Date:	Mon, 10 May 2010 16:40:38 +0200
From:	Matthias Fuchs <matthias.fuchs@....eu>
To:	Wolfgang Grandegger <wg@...ndegger.com>
Cc:	netdev@...r.kernel.org, Socketcan-core@...ts.berlios.de,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH v2] can: Add driver for esd CAN-USB/2 device

Hi Wolfgang,

On Monday 10 May 2010 15:43, Wolfgang Grandegger wrote:
> Hi Matthias,
> 
> On 05/10/2010 03:28 PM, Matthias Fuchs wrote:
> > This patch adds a driver for esd's USB high speed
> > CAN interface. The driver supports devices with
> > multiple CAN interfaces.
> > 
> > Signed-off-by: Matthias Fuchs <matthias.fuchs@....eu>
> > ---
> > 
> > version 2: 
> >  - use bus-error reporting and counters
> 
> I don't find support for CAN_CTRLMODE_BERR_REPORTING, apart from setting
> the flag. If it's set bus error interrupts should be enabled or disabled
> otherwise.
> 
> Wolfgang.
I expect my implementation to be complete.

1) In esd_usb2_rx_event() I pass tx/rxerr in cf->data[6/7].
2) I implemented esd_usb2_get_berr_counter(). This function will 
   return the last tx/rx error counters from the hardware that
   are kept in priv->bec.
3) tx/rx error counter cannot be requested from the hardware so
   they are stored in priv->bec when they are received from the hardware.
   There is no way to enable or disable this behavior.
4) Finally I enabled the whole interface via CAN_CTRLMODE_BERR_REPORTING
   for the CAN framework.

I don't see where I missed anything.

Matthias
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