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authorChris Wilson <chris@chris-wilson.co.uk>2015-01-26 18:03:03 +0200
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-01-28 17:22:12 +0100
commit737b1506037788f1e01b2a4c5795d4180b2e2e00 (patch)
tree6c8c2fd71c7726e7725535c3e935edf1369e01f6 /net/irda
parent983d308cb8f602d1920a8c40196eb2ab6cc07bd2 (diff)
drm/i915: Convert hangcheck from a timer into a delayed work item
When run as a timer, i915_hangcheck_elapsed() must adhere to all the rules of running in a softirq context. This is advantageous to us as we want to minimise the risk that a driver bug will prevent us from detecting a hung GPU. However, that is irrelevant if the driver bug prevents us from resetting and recovering. Still it is prudent not to rely on mutexes inside the checker, but given the coarseness of dev->struct_mutex doing so is extremely hard. Give in and run from a work queue, i.e. outside of softirq. v2: Use own workqueue to avoid deadlocks (Daniel) Cleanup commit msg and add comment to i915_queue_hangcheck() (Chris) Cc: Jani Nikula <jani.nikula@intel.com> Cc: Daniel Vetter <dnaiel.vetter@ffwll.chm> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> (v1) Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com> [danvet: Remove accidental kerneldoc comment starter, to appease the 0 day builder.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'net/irda')
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