From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Wed, 9 Jul 2014 17:31:57 +0000 (-0300)
Subject: drm/i915: get/put runtime PM at i915_semaphore_status
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=03872064f77f4beb61d1afc22adf62da47cf087b;p=linux-beck.git

drm/i915: get/put runtime PM at i915_semaphore_status

Otherwise we will print some WARNs when we read registers and the
machine is suspended.

Testcase: igt/pm_rpm/debugfs-read
Cc: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 394519182510..952f19949be1 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2314,6 +2314,7 @@ static int i915_semaphore_status(struct seq_file *m, void *unused)
 	ret = mutex_lock_interruptible(&dev->struct_mutex);
 	if (ret)
 		return ret;
+	intel_runtime_pm_get(dev_priv);
 
 	if (IS_BROADWELL(dev)) {
 		struct page *page;
@@ -2363,6 +2364,7 @@ static int i915_semaphore_status(struct seq_file *m, void *unused)
 	}
 	seq_putc(m, '\n');
 
+	intel_runtime_pm_put(dev_priv);
 	mutex_unlock(&dev->struct_mutex);
 	return 0;
 }