From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: mikeci@acm.org
Cc: "Jiri Slaby" <jslaby@suse.cz>, <linux-kernel@vger.kernel.org>
Subject: Re: Possible bug in 8250.c
Date: Sat, 20 Aug 2011 17:21:56 +0100 [thread overview]
Message-ID: <20110820172156.1ece472c@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <29681.1313801904@sonic.net>
> So in first iteration, interrupt is cleared, and in second, function will execute:
>
> } else if (end == NULL)
> end = l;
>
> which will terminate the loop, but the return code will be IRQ_RETVAL(0).
If you are getting an extra IRQ when then chip itself is indicating no
IRQ then the IRQ is spurious. That probably means you have a problem
elsewhere - eg the IRQ controller being misconfigured between level/edge
triggered.
Alan
next prev parent reply other threads:[~2011-08-20 16:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-20 0:58 Ivica Mikec
2011-08-20 16:21 ` Alan Cox [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-08-19 17:44 Ivica Mikec
2011-08-19 19:01 ` Jiri Slaby
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