From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Vetter Subject: Re: [PATCH] drm/i915: use do_div() as needed in debugfs code Date: Wed, 13 Mar 2013 21:18:09 +0100 Message-ID: <20130313201809.GB1896@bremse> References: <20130312054631.GA21167@www.outflux.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20130312054631.GA21167@www.outflux.net> Sender: linux-kernel-owner@vger.kernel.org To: Kees Cook Cc: linux-kernel@vger.kernel.org, Stephen Rothwell , Daniel Vetter , David Airlie , dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org On Mon, Mar 11, 2013 at 10:46:31PM -0700, Kees Cook wrote: > This replaces the open-coded divisions in the debugfs code by calls > to do_div(). > > Signed-off-by: Kees Cook > Cc: Daniel Vetter Squashed into the debugfs patch which introduced this regression, thanks for the quick fixup. -Daniel > --- > 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 -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch