From: Dave Airlie <airlied@gmail.com>
To: dri-devel@lists.freedesktop.org
Subject: [rfc] fix output poll execute lockdep
Date: Tue, 10 Jan 2017 12:12:30 +1000 [thread overview]
Message-ID: <20170110021232.15389-1-airlied@gmail.com> (raw)
On runtime resume, nouveau can try and take the mode_config
mutex in the poll reenable, however a poll can race with this,
and take the mutex and get stuck waiting for the runtime to
finish completion. These two patches allow the driver to
get hooked in before the mutex is taken.
I think radeon/amdgpu will also need similar patches to nouveau.
I found this while trying to track down a runtime regression
on W541 laptop, I'm not sure I found what the reporter was seeing yet.
Dave.
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next reply other threads:[~2017-01-10 2:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-10 2:12 Dave Airlie [this message]
2017-01-10 2:12 ` [PATCH 1/2] drm: allow drivers to wrap output poll execution Dave Airlie
2017-01-10 2:12 ` [PATCH 2/2] nouveau: wrap the output poll execution and wakeup gpu Dave Airlie
2017-01-10 9:49 ` [rfc] fix output poll execute lockdep Daniel Vetter
2017-01-10 11:46 ` Dave Airlie
2017-01-10 12:34 ` Daniel Vetter
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