From 23f4a287fc97d94b6110ee0e17ec92670cc8de89 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sat, 18 Feb 2017 11:27:08 +0000 Subject: [PATCH] drm/i915: Prevent divide-by-zero in debugfs/i915_rps_boost_info Either by chance, or by misread, the current evaluation interval may be zero. If that is the case, don't divide by it! Signed-off-by: Chris Wilson Link: http://patchwork.freedesktop.org/patch/msgid/20170218112708.24504-1-chris@chris-wilson.co.uk Reviewed-by: Radoslaw Szwichtenberg --- drivers/gpu/drm/i915/i915_debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 404394e..768461f 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2356,10 +2356,10 @@ static int i915_rps_boost_info(struct seq_file *m, void *data) seq_printf(m, "\nRPS Autotuning (current \"%s\" window):\n", rps_power_to_str(dev_priv->rps.power)); seq_printf(m, " Avg. up: %d%% [above threshold? %d%%]\n", - 100 * rpup / rpupei, + rpup && rpupei ? 100 * rpup / rpupei : 0, dev_priv->rps.up_threshold); seq_printf(m, " Avg. down: %d%% [below threshold? %d%%]\n", - 100 * rpdown / rpdownei, + rpdown && rpdownei ? 100 * rpdown / rpdownei : 0, dev_priv->rps.down_threshold); } else { seq_puts(m, "\nRPS Autotuning inactive\n"); -- 2.7.4