From: Andre Renaud <arenaud@designa-electronics.com>
To: "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>
Cc: "Andy Duan" <fugang.duan@nxp.com>,
s.hauer@pengutronix.de, "Fabio Estevam" <festevam@gmail.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Subject: Re: iMX6/UART imprecise external abort
Date: Sat, 21 Dec 2019 16:33:46 +1300 [thread overview]
Message-ID: <FD3C2267-A9B8-45BB-B027-C85DB5E60829@designa-electronics.com> (raw)
In-Reply-To: <CAEj2-1PyhkhEJ1+uRWio4vYxGuFOuR9mpZOdxmDDjGt_Az+3uA@mail.gmail.com>
> On 3/12/2019, at 9:40 AM, Andre Renaud <arenaud@designa-electronics.com> wrote:
> I am working with an iMX6Q system that is exhibiting a crash when
> using the serial ports.
> We have /dev/ttymxc2 configured as an RS485 UART, and are seeing an
> 'imprecise external abort' after some time of use (panic listed
> below).
Following up on this. After various attempts to replicate it on different boards, we found that after enabling the SER_RS485_RX_DURING_TX flag, the issue went away. This in turn led us to discover that the issue we were seeing is the same one discussed in this prior discussion: https://www.spinics.net/lists/arm-kernel/msg564268.html
We took the patch there, modified it to suite our kernel, and have confirmed that this resolves the issue.
Can anyone comment on whether that patch, or some variant on it, should be forward ported to the latest kernel? It has a slightly odd timeout in there, with no error return value, but apart from that it does resolve out issue.
Regards,
Andre
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next prev parent reply other threads:[~2019-12-21 3:34 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-02 20:40 iMX6/UART imprecise external abort Andre Renaud
2019-12-02 20:56 ` Fabio Estevam
2019-12-03 1:53 ` [EXT] " Andy Duan
2019-12-03 2:01 ` Andre Renaud
2019-12-03 2:06 ` Andy Duan
2019-12-03 2:28 ` Fabio Estevam
2019-12-03 6:24 ` Andre Renaud
2019-12-10 4:03 ` Andre Renaud
2019-12-10 5:46 ` [EXT] " Andy Duan
2019-12-10 22:07 ` Andre Renaud
2019-12-11 0:27 ` Fabio Estevam
2019-12-11 1:35 ` [EXT] " Andre Renaud
2019-12-11 1:59 ` Andre Renaud
2019-12-12 1:35 ` Fabio Estevam
2019-12-15 23:41 ` Andre Renaud
2019-12-02 21:29 ` Uwe Kleine-König
2019-12-05 19:29 ` Andre Renaud
2019-12-21 3:33 ` Andre Renaud [this message]
2019-12-21 7:31 ` [EXT] " Andy Duan
2019-12-21 12:03 ` Fabio Estevam
2019-12-23 1:53 ` Andy Duan
2019-12-23 10:16 ` Uwe Kleine-König
2020-01-07 22:24 ` Uwe Kleine-König
2020-01-08 1:43 ` Andy Duan
2020-01-08 4:03 ` Andre Renaud
2020-01-08 5:11 ` Andy Duan
2020-01-08 6:43 ` Uwe Kleine-König
2020-01-08 6:40 ` Uwe Kleine-König
2020-01-08 11:23 ` Uwe Kleine-König
2020-01-09 1:33 ` Andy Duan
2020-01-19 23:29 ` Andre Renaud
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