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From: Marc Kleine-Budde <mkl@pengutronix.de>
To: Koen Vandeputte <koen.vandeputte@citymesh.com>
Cc: linux-can@vger.kernel.org, wg@grandegger.com,
	netdev@vger.kernel.org, qiangqing.zhang@nxp.com,
	gregkh@linuxfoundation.org
Subject: Re: flexcan introduced a DIV/0 in kernel
Date: Fri, 9 Apr 2021 15:10:01 +0200	[thread overview]
Message-ID: <20210409131001.7r36v2vd3zmceloj@pengutronix.de> (raw)
In-Reply-To: <f7ba143a-58c8-811a-876e-d494c4681537@citymesh.com>

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On 09.04.2021 14:55:59, Koen Vandeputte wrote:
> 
> On 09.04.21 13:21, Marc Kleine-Budde wrote:
> > On 4/9/21 12:18 PM, Koen Vandeputte wrote:
> > > Hi All,
> > > 
> > > I just updated kernel 4.14 within OpenWRT from 4.14.224 to 4.14.229
> > > Booting it shows the splat below on each run. [1]
> > > 
> > > 
> > > It seems there are 2 patches regarding flexcan which were introduced in
> > > 4.14.226
> > > 
> > > --> ce59ffca5c49 ("can: flexcan: enable RX FIFO after FRZ/HALT valid")
> > > --> bb7c9039a396 ("can: flexcan: assert FRZ bit in flexcan_chip_freeze()")
> > > 
> > > Reverting these fixes the splat.
> > This patch should fix the problem:
> > 
> > 47c5e474bc1e can: flexcan: flexcan_chip_freeze(): fix chip freeze for missing
> > bitrate
> > 
> > Greg, can you pick this up for v4.14?
> > 
> > regards,
> > Marc
> > 
> Checking kernels 4.4 & 4.9 shows that this fix is also missing over there.
> 
> Marc,
> Can you confirm that it's also required for these?

ACK, the fix is needed for v4.4.265 and v4.9.265.

Thanks for checking this,
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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  reply	other threads:[~2021-04-09 13:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-09 10:18 flexcan introduced a DIV/0 in kernel Koen Vandeputte
2021-04-09 11:21 ` Marc Kleine-Budde
2021-04-09 11:32   ` Greg KH
2021-04-09 12:55   ` Koen Vandeputte
2021-04-09 13:10     ` Marc Kleine-Budde [this message]
2021-04-09 13:27       ` Greg KH
2021-04-12  1:56 ` Joakim Zhang

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