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>

1 files changed, 2 insertions, 0 deletions

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;
 }