From: Dmitry Osipenko Date: Mon, 4 Nov 2019 21:56:03 +0000 (+0300) Subject: PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out X-Git-Tag: v4.4.238~70 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9fa1b9fed8ec4cc46a1f7763eda306e2389b3e3f;p=thirdparty%2Fkernel%2Fstable.git PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out [ Upstream commit 53b4b2aeee26f42cde5ff2a16dd0d8590c51a55a ] 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 Tested-by: Peter Geis Signed-off-by: Dmitry Osipenko Signed-off-by: Chanwoo Choi Signed-off-by: Sasha Levin --- diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c index 64a2e02b87d78..0b0de6a049afb 100644 --- a/drivers/devfreq/tegra-devfreq.c +++ b/drivers/devfreq/tegra-devfreq.c @@ -79,6 +79,8 @@ #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 @@ -179,7 +181,7 @@ 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 },