The final arrangement of updating timer->expires and calling mod_timer()
used in
commit 672e7b7c1849c904b2c55185906b3940843c55c6
Author: Chris Wilson <ch...@chris-wilson.co.uk>
Date: Wed Nov 19 09:47:19 2014 +0000
drm/i915: Don't continually defer the hangcheck
turns out to be very unsafe. Try again.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuopp...@intel.com>
---
drivers/gpu/drm/i915/i915_irq.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 8d169e152d1e..5908580d7c15 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3067,9 +3067,10 @@ void i915_queue_hangcheck(struct drm_device *dev)
return;
/* Don't continually defer the hangcheck, but make sure it is active */
- if (!timer_pending(timer))
- timer->expires = round_jiffies_up(jiffies +
DRM_I915_HANGCHECK_JIFFIES);
- mod_timer(timer, timer->expires);
+ if (timer_pending(timer))
+ return;
+ mod_timer(timer,
+ round_jiffies_up(jiffies + DRM_I915_HANGCHECK_JIFFIES));
}
static void ibx_irq_reset(struct drm_device *dev)
--
2.1.3
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