linux-kernel - [ 008/108] drm/i915: fix operator precedence when enabling RC6p

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Message-Id: <20120723010652.743997034@decadent.org.uk>
Date:	Mon, 23 Jul 2012 02:06:59 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Eugeni Dodonov <eugeni.dodonov@...el.com>,
	Dave Airlie <airlied@...hat.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: [ 008/108] drm/i915: fix operator precedence when enabling RC6p

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eugeni Dodonov <eugeni.dodonov@...el.com>

commit c0e2ee1bc0cf82eec89e26b7afe7e4db0561b7d9 upstream.

As noticed by Torsten Kaiser, the operator precedence can play tricks with
us here.

CC: Dave Airlie <airlied@...hat.com>
Signed-off-by: Eugeni Dodonov <eugeni.dodonov@...el.com>
Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/i915/intel_display.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e654f32..4871ba0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -8194,7 +8194,7 @@ void gen6_enable_rps(struct drm_i915_private *dev_priv)
 
 	if (intel_enable_rc6(dev_priv->dev))
 		rc6_mask = GEN6_RC_CTL_RC6_ENABLE |
-			(IS_GEN7(dev_priv->dev)) ? GEN6_RC_CTL_RC6p_ENABLE : 0;
+			((IS_GEN7(dev_priv->dev)) ? GEN6_RC_CTL_RC6p_ENABLE : 0);
 
 	I915_WRITE(GEN6_RC_CONTROL,
 		   rc6_mask |


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