From: Chris Wilson <chris@chris-wilson.co.uk>
To: intel-gfx@lists.freedesktop.org
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>, Ben Widawsky <ben@bwidawsk.net>
Subject: Re: [PATCH] drm/i915: Fix rps irq warning
Date: Sun, 04 Sep 2011 10:03:21 +0100 [thread overview]
Message-ID: <e39f63$1eepkg@fmsmga002.fm.intel.com> (raw)
In-Reply-To: <1315106655-26782-1-git-send-email-ben@bwidawsk.net>
On Sat, 3 Sep 2011 20:24:15 -0700, Ben Widawsky <ben@bwidawsk.net> wrote:
> I couldn't reproduce this one, but... Interrupt mask state is lost if
> three interrupts occur before the workqueue has run.
>
> Should be straight forward to reproduce even without SMP. I'm pretty
> sure Dan Vetter was trying to explain this to me, and I couldn't get it.
> My solution I think is different than his though.
This logic is now duplicated in ivybridge_irq_handler(). This simply fits
the scenario Daniel described, whilst also fitting in with our
understanding of IMR, IER and IIR. (A big assumption ;-)
Reported-by: Soeren Sonnenburg <sonne@debian.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
next prev parent reply other threads:[~2011-09-04 9:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-04 3:24 [PATCH] drm/i915: Fix rps irq warning Ben Widawsky
2011-09-04 9:03 ` Chris Wilson [this message]
2011-09-04 15:49 ` Ben Widawsky
2011-09-04 15:34 ` [PATCH 0/3] slaughter rps races some more Daniel Vetter
2011-09-04 15:35 ` [PATCH 1/3] drm/i915: close PM interrupt masking races in the irq handler Daniel Vetter
2011-09-04 17:09 ` Ben Widawsky
2011-09-04 15:35 ` [PATCH 2/3] drm/i915: close PM interrupt masking races in the rps work func Daniel Vetter
2011-09-04 17:08 ` Ben Widawsky
2011-09-04 19:26 ` Daniel Vetter
2011-09-04 19:56 ` Ben Widawsky
2011-09-04 20:10 ` Daniel Vetter
2011-09-04 21:38 ` Ben Widawsky
2011-09-05 6:38 ` Daniel Vetter
2011-09-05 6:51 ` Ben Widawsky
2011-09-05 12:15 ` Chris Wilson
2011-09-04 15:35 ` [PATCH 3/3] drm/i915: close rps work vs. rps disable races Daniel Vetter
2011-09-04 17:23 ` Ben Widawsky
2011-09-04 19:17 ` Daniel Vetter
2011-09-04 19:50 ` Ben Widawsky
2011-09-04 19:57 ` Daniel Vetter
2011-09-05 8:15 ` [PATCH] drm/i915: properly cancel rps_work on module unload Daniel Vetter
2011-09-05 17:27 ` Ben Widawsky
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