From dbea3cea69508e9d548ed4a6be13de35492e5d15 Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Mon, 15 Dec 2014 18:59:28 +0200 Subject: drm/i915: sanitize RPS resetting during GPU reset Atm, we don't disable RPS interrupts and related work items before resetting the GPU. This may interfere with the following GPU initialization and cause RPS interrupts to show up in PM_IIR too early before calling gen6_enable_rps_interrupts() (triggering a WARN there). Solve this by disabling RPS interrupts and flushing any related work items before resetting the GPU. v2: - split out the common parts of the gt suspend and the new gt reset functions (Paulo) v3: - remove the check for UMS, it's a NOP nowadays (Daniel) Reported-by: He, Shuang Testcase: igt/gem_reset_stats/ban-render Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86644 Signed-off-by: Imre Deak Reviewed-by: Paulo Zanoni Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/i915_drv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/gpu/drm/i915/i915_drv.c') diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index f990ab4c3efb..fc8cfddbf232 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -811,6 +811,8 @@ int i915_reset(struct drm_device *dev) if (!i915.reset) return 0; + intel_reset_gt_powersave(dev); + mutex_lock(&dev->struct_mutex); i915_gem_reset(dev); @@ -880,7 +882,7 @@ int i915_reset(struct drm_device *dev) * of re-init after reset. */ if (INTEL_INFO(dev)->gen > 5) - intel_reset_gt_powersave(dev); + intel_enable_gt_powersave(dev); } else { mutex_unlock(&dev->struct_mutex); } -- cgit v1.2.3