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From: Frieder Schrempf <frieder.schrempf@kontron.de>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: "Marc Kleine-Budde" <mkl@pengutronix.de>,
	linux-can@vger.kernel.org,
	"Wolfgang Grandegger" <wg@grandegger.com>,
	"David S. Miller" <davem@davemloft.net>,
	"Jakub Kicinski" <kuba@kernel.org>,
	"Liam Girdwood" <lgirdwood@gmail.com>,
	"Mark Brown" <broonie@kernel.org>,
	"Vincent Mailhol" <mailhol.vincent@wanadoo.fr>,
	"Oliver Hartkopp" <socketcan@hartkopp.net>,
	"Timo Schlüßler" <schluessler@krause.de>,
	"Tim Harvey" <tharvey@gateworks.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: Null pointer dereference in mcp251x driver when resuming from sleep
Date: Mon, 3 May 2021 15:49:22 +0200	[thread overview]
Message-ID: <8dcdeab9-80f1-5961-6d55-82b4904cbf14@kontron.de> (raw)
In-Reply-To: <YI/+OP4z787Tmd05@smile.fi.intel.com>

On 03.05.21 15:44, Andy Shevchenko wrote:
> On Mon, May 03, 2021 at 03:11:40PM +0200, Frieder Schrempf wrote:
>> Hi,
>>
>> with kernel 5.10.x and 5.12.x I'm getting a null pointer dereference
>> exception from the mcp251x driver when I resume from sleep (see trace
>> below).
>>
>> As far as I can tell this was working fine with 5.4. As I currently don't
>> have the time to do further debugging/bisecting, for now I want to at least
>> report this here.
>>
>> Maybe there is someone around who could already give a wild guess for what
>> might cause this just by looking at the trace/code!?
> 
> Does revert of c7299fea6769 ("spi: Fix spi device unregister flow") help?

This commit is so new, that it is neither in 5.10.x nor in 5.12.1. So it 
can't be the reason.

      parent reply	other threads:[~2021-05-03 13:49 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-03 13:11 Null pointer dereference in mcp251x driver when resuming from sleep Frieder Schrempf
2021-05-03 13:44 ` Andy Shevchenko
2021-05-03 13:48   ` Andy Shevchenko
2021-05-03 13:54     ` Andy Shevchenko
2021-05-04 13:54       ` Frieder Schrempf
2021-05-04 14:19         ` Andy Shevchenko
2021-05-03 13:49   ` Frieder Schrempf [this message]

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