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PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out 

[ Upstream commit 53b4b2aeee ]

There is another kHz-conversion bug in the code, resulting in integer
overflow. Although, this time the resulting value is 4294966296 and it's
close to ULONG_MAX, which is okay in this case.

Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Dmitry Osipenko 2019-11-05 00:56:03 +03:00 committed by Greg Kroah-Hartman
parent d550b07e1a
commit 4241376371
1 changed files with 3 additions and 1 deletions
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4
drivers/devfreq/tegra30-devfreq.c
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@ -68,6 +68,8 @@
#define KHZ 1000
#define KHZ_MAX (ULONG_MAX / KHZ)
/* Assume that the bus is saturated if the utilization is 25% */
#define BUS_SATURATION_RATIO 25
@ -169,7 +171,7 @@ struct tegra_actmon_emc_ratio {
};
static struct tegra_actmon_emc_ratio actmon_emc_ratios[] = {
{ 1400000, ULONG_MAX },
{ 1400000, KHZ_MAX },
{ 1200000, 750000 },
{ 1100000, 600000 },
{ 1000000, 500000 },