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authorBen Widawsky <ben@bwidawsk.net>2012-11-06 14:36:36 +0000
committerDaniel Vetter <daniel.vetter@ffwll.ch>2012-11-11 23:51:45 +0100
commit44cbd33899302fc5294fc5fedfd0276348d796e4 (patch)
tree1af58fbe7c7589940ffe193b21d6fd04f49e99e7 /drivers/gpu/drm/i915/i915_debugfs.c
parent26b1ff35c8c4888fb544f290e0fc64143f7dbe45 (diff)
drm/i915: Missed lock change with rps lock
Fixes a WARN_ON in igt/tests/debugfs_reader CC: Jesse Barnes <jbarnes@virtuousgeek.org> Signed-off-by: Ben Widawsky <ben@bwidawsk.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
-rw-r--r--drivers/gpu/drm/i915/i915_debugfs.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 09cd7d76f6ae..4568e7d8a060 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1096,8 +1096,10 @@ 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));