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From: Daniel Stone <daniels@collabora.com>
To: intel-gfx@lists.freedesktop.org
Subject: [PATCH 2/2] drm/i915/pm: Print offending domain in refcount failure
Date: Thu, 19 Nov 2015 17:59:11 +0000	[thread overview]
Message-ID: <1447955951-19170-2-git-send-email-daniels@collabora.com> (raw)
In-Reply-To: <1447955951-19170-1-git-send-email-daniels@collabora.com>

If we experience a refcounting failure in a power domain/well (unref'ing at
least one too many times), log the name of the offending domain or well.

Signed-off-by: Daniel Stone <daniels@collabora.com>
---
 drivers/gpu/drm/i915/intel_runtime_pm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index a1dc815..df2b8a8 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -1433,11 +1433,15 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
 
 	mutex_lock(&power_domains->lock);
 
-	WARN_ON(!power_domains->domain_use_count[domain]);
+	WARN(!power_domains->domain_use_count[domain],
+	     "Use count on domain %s is already zero\n",
+	     intel_display_power_domain_str(domain));
 	power_domains->domain_use_count[domain]--;
 
 	for_each_power_well_rev(i, power_well, BIT(domain), power_domains) {
-		WARN_ON(!power_well->count);
+		WARN(!power_well->count,
+		     "Use count on power well %s is already zero",
+		     power_well->name);
 
 		if (!--power_well->count)
 			intel_power_well_disable(dev_priv, power_well);
-- 
2.5.0

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  reply	other threads:[~2015-11-19 17:59 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-19 17:59 [PATCH 1/2] drm/i915/pm: Unconstify power_domain_str Daniel Stone
2015-11-19 17:59 ` Daniel Stone [this message]
2015-11-19 18:24 ` Ville Syrjälä
2015-11-19 18:26   ` Daniel Stone
2015-11-19 18:39     ` Ville Syrjälä
2015-11-20  8:21       ` Jani Nikula
2015-11-20 15:56         ` Daniel Stone

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