[Intel-gfx] [PATCH 2/3] drm/i915: no hangcheck when reset is in progress

[Mika Kuoppala]

The timer for hangchecking can run again before the previous
reset it has triggered has been handled. This can corrupt
the hangcheck state as reset handling will access and write to
the hangcheck data. To prevent this, avoid running the hangcheck
logic while reset is in progress.

Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 3a25a6c..e709a47 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2434,6 +2434,9 @@ void i915_hangcheck_elapsed(unsigned long data)
 	if (!i915_enable_hangcheck)
 		return;
 
+	if (i915_reset_in_progress(&dev_priv->gpu_error))
+		return;
+
 	for_each_ring(ring, dev_priv, i) {
 		u32 seqno, acthd;
 		bool busy = true;
-- 
1.7.9.5