linux-kernel - [PATCH] drm/i915: use do_div() as needed in debugfs code

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Message-ID: <20130312054631.GA21167@www.outflux.net>
Date:	Mon, 11 Mar 2013 22:46:31 -0700
From:	Kees Cook <keescook@...omium.org>
To:	linux-kernel@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Daniel Vetter <daniel.vetter@...ll.ch>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org
Subject: [PATCH] drm/i915: use do_div() as needed in debugfs code

This replaces the open-coded divisions in the debugfs code by calls
to do_div().

Signed-off-by: Kees Cook <keescook@...omium.org>
Cc: Daniel Vetter <daniel.vetter@...ll.ch>
---
 drivers/gpu/drm/i915/i915_debugfs.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index d86c304..6f3cbf8 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -1814,9 +1814,9 @@ i915_max_freq_set(void *data, u64 val)
 	/*
 	 * Turbo will still be enabled, but won't go above the set value.
 	 */
-	dev_priv->rps.max_delay = val / GT_FREQUENCY_MULTIPLIER;
-
-	gen6_set_rps(dev, val / GT_FREQUENCY_MULTIPLIER);
+	do_div(val, GT_FREQUENCY_MULTIPLIER);
+	dev_priv->rps.max_delay = val;
+	gen6_set_rps(dev, val);
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
 	return 0;
@@ -1865,9 +1865,9 @@ i915_min_freq_set(void *data, u64 val)
 	/*
 	 * Turbo will still be enabled, but won't go below the set value.
 	 */
-	dev_priv->rps.min_delay = val / GT_FREQUENCY_MULTIPLIER;
-
-	gen6_set_rps(dev, val / GT_FREQUENCY_MULTIPLIER);
+	do_div(val, GT_FREQUENCY_MULTIPLIER);
+	dev_priv->rps.min_delay = val;
+	gen6_set_rps(dev, val);
 	mutex_unlock(&dev_priv->rps.hw_lock);
 
 	return 0;
-- 
1.7.9.5


-- 
Kees Cook
Chrome OS Security
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