netdev - Re: [net-next 6/6] can: mcp251xfd: mcp251xfd_regmap_crc_read(): work around broken CRC on TBC register

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Message-ID: <20210508123038.zzowctdgpjld23hs@pengutronix.de>
Date:   Sat, 8 May 2021 14:30:38 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     Drew Fustini <pdp7pdp7@...il.com>
Cc:     Drew Fustini <drew@...gleboard.org>, netdev@...r.kernel.org,
        "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        Will C <will@...china.cc>, menschel.p@...teo.de
Subject: Re: [net-next 6/6] can: mcp251xfd: mcp251xfd_regmap_crc_read(): work
 around broken CRC on TBC register

On 07.05.2021 15:36:32, Drew Fustini wrote:
> > > > Would it be possible for you to pull these patches into a v5.10 branch
> > > > in your linux-rpi repo [1]?
> > >
> > > Here you are:
> > >
> > > https://github.com/marckleinebudde/linux-rpi/tree/v5.10-rpi/backport-performance-improvements
> > >
> > > I've included the UINC performance enhancements, too. The branch is compiled
> > > tested only, though. I'll send a pull request to the rpi kernel after I've
> > > testing feedback from you.
> >
> > Drew, Patrick, have you tested this branch? If so I'll send a pull
> > request to the raspi kernel.
> 
> Thank you for following up.
> 
> I need to build it and send it to the friend who was testing to check
> if the CRC errors go away.  He is testing CANFD with a 2021 Ford F150
> truck.  I will follow up here once I know the results.

The CRC Errors don't go away completely, however they are reduced by
more than an order of magnitude.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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