linux-kernel - Re: [PATCH] sc16is7xx: drop bogus use of IRQF

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Date:   Fri, 9 Sep 2016 15:14:32 +0200
From:   Sebastian Andrzej Siewior <sebastian.siewior@...utronix.de>
To:     Josh Cartwright <joshc@...com>
Cc:     Jakub Kicinski <moorray3@...pl>, linux-serial@...r.kernel.org,
        linux-rt-users@...r.kernel.org,
        Sean Nyekjaer <sean.nyekjaer@...vas.dk>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sc16is7xx: drop bogus use of IRQF_ONESHOT

On 2016-02-18 11:26:12 [-0600], Josh Cartwright wrote:
> The use of IRQF_ONESHOT when registering an interrupt handler with
> request_irq() is non-sensical.
> 
> Not only that, it also prevents the handler from being threaded when it
> otherwise should be w/ IRQ_FORCED_THREADING is enabled.  This causes the
> following deadlock observed by Sean Nyekjaer on -rt:

So we this patch 
  http://lkml.iu.edu/hypermail/linux/kernel/1602.2/02637.html

sitting in -RT. Then someone posted
  http://www.spinics.net/lists/linux-rt-users/msg14975.html
which depends on it.
Before I was are of the first patch, I posted
  http://www.spinics.net/lists/linux-rt-users/msg14666.html

and nobody seems to care if anything of this gets merged upstream
where it belongs. Could some please carry this to Greg upstream?

Sebastian