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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 <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170218112708.24504-1-chris@chris-wilson.co.uk
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
hifive-unleashed-5.1
Chris Wilson 2017-02-18 11:27:08 +00:00
parent 48cb91203e
commit 23f4a287fc
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/i915_debugfs.c
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@ -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");