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msm: kgsl: fix division results for UBSAN warnings

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Possible divide by zero can occur in wait_active_percent
calculation as reported by UBSAN. Fix this possible
division by zero.

Change-Id: I9068fbcc9347eade8a51c7fc3526491511188f03
Signed-off-by: Pranav Patel <quic_pranavp@quicinc.com>
This commit is contained in:
Pranav Patel
2022-06-27 19:40:55 +05:30
parent ded0049a15
commit c840316522
1 changed files with 10 additions and 2 deletions
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12
drivers/devfreq/governor_gpubw_mon.c
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@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2014-2020, The Linux Foundation. All rights reserved.
* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/devfreq.h>
@@ -149,8 +150,15 @@ static int devfreq_gpubw_get_target(struct devfreq *df,
(unsigned int) priv->bus.total_time;
norm_cycles = (unsigned int)(priv->bus.ram_time + priv->bus.ram_wait) /
(unsigned int) priv->bus.total_time;
wait_active_percent = (100 * (unsigned int)priv->bus.ram_wait) /
(unsigned int) priv->bus.ram_time;
if (priv->bus.ram_wait == 0)
wait_active_percent = 0;
else if (priv->bus.ram_time == 0)
wait_active_percent = 100;
else
wait_active_percent = (100 * (unsigned int)priv->bus.ram_wait) /
(unsigned int) priv->bus.ram_time;
gpu_percent = (100 * (unsigned int)priv->bus.gpu_time) /
(unsigned int) priv->bus.total_time;