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drm/i915: Stop dropping irq around resets 

A long time ago, we were afraid of handling interrupts and signaling
waiters during a reset, worrying that the confusion in request handling
would interfere with our attempts to process the reset in an orderly
fashion. Since then, we have isolated our irq-driven request handling by
virtue of the engine->timeline.lock and control of kthreads where
required, eliminating the danger of concurrently processing interrupts.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180806145647.13131-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-08-06 15:56:47 +01:00
parent 08e3e21a24
commit a6476ebd43
1 changed files with 0 additions and 3 deletions
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3
drivers/gpu/drm/i915/i915_drv.c
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@ -1918,7 +1918,6 @@ void i915_reset(struct drm_i915_private *i915,
dev_notice(i915->drm.dev, "Resetting chip for %s\n", reason);
error->reset_count++;
disable_irq(i915->drm.irq);
ret = i915_gem_reset_prepare(i915);
if (ret) {
dev_err(i915->drm.dev, "GPU recovery failed\n");
@ -1980,8 +1979,6 @@ void i915_reset(struct drm_i915_private *i915,
finish:
i915_gem_reset_finish(i915);
enable_irq(i915->drm.irq);
wakeup:
clear_bit(I915_RESET_HANDOFF, &error->flags);
wake_up_bit(&error->flags, I915_RESET_HANDOFF);