From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wolfgang Grandegger <wg@grandegger.com>
Subject: Re: sja1000 interrupt problem
Date: Sat, 21 Dec 2013 09:29:56 +0100
Message-ID: <52B55184.901@grandegger.com>
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To: Austin Schuh <austin@peloton-tech.com>, Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Pavel Pisa <pisa@cmp.felk.cvut.cz>, Marc Kleine-Budde <mkl@pengutronix.de>, linux-can@vger.kernel.org

Hi Austin,

On 12/21/2013 12:13 AM, Austin Schuh wrote:
> I have applied the fix proposed in https://lkml.org/lkml/2013/3/7/222
> for the note_interrupt function right now, and will run a test this
> weekend to see if it fixes it for sure.  I am now consistently seeing
> only 1 / 100000 of the IRQ handler calls being counted as unhandled,
> which is a lot better.

The patch confirms our observations and I was already thinking of
reporting it on the Linux-RT mailing list (or directly to Thomas). Well,
next time I will hesitate less.

Wolfgang.