Fixes a WARN_ON in igt/tests/debugfs_reader
CC: Jesse Barnes <jbar...@virtuousgeek.org>
Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
---
drivers/gpu/drm/i915/i915_debugfs.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c
b/drivers/gpu/drm/i915/i915_debugfs.c
index e842dea..09bc24c 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1108,8 +1108,10 @@ static int gen6_drpc_info(struct seq_file *m)
rpmodectl1 = I915_READ(GEN6_RP_CONTROL);
rcctl1 = I915_READ(GEN6_RC_CONTROL);
- sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
mutex_unlock(&dev->struct_mutex);
+ mutex_lock(&dev_priv->rps.hw_lock);
+ sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
+ mutex_unlock(&dev_priv->rps.hw_lock);
seq_printf(m, "Video Turbo Mode: %s\n",
yesno(rpmodectl1 & GEN6_RP_MEDIA_TURBO));
--
1.8.0
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