lkml.org 
[lkml]   [2019]   [Jun]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 14/17] PM / devfreq: tegra30: Ensure that target freq won't overflow
Date
Potentially very high boosting could cause an integer overflow for a
highly clocked memory after conversion to MHz.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/devfreq/tegra30-devfreq.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c
index d85de0e3dce0..1dcc2d2fa9e0 100644
--- a/drivers/devfreq/tegra30-devfreq.c
+++ b/drivers/devfreq/tegra30-devfreq.c
@@ -458,6 +458,7 @@ static unsigned long actmon_update_target(struct tegra_devfreq *tegra,
{ unsigned long target_freq;

target_freq = dev->avg_count / ACTMON_SAMPLING_PERIOD + dev->boost_freq;
+ target_freq = min(target_freq, ULONG_MAX / KHZ);
target_freq = tegra_actmon_account_cpu_freq(tegra, dev, target_freq);

return target_freq;
--
2.22.0
\
 
 \ /
  Last update: 2019-06-26 03:36    [W:0.086 / U:39.456 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site