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| author | Dmitry Osipenko <digetx@gmail.com> | 2019-11-05 00:56:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-01 20:40:02 +0200 |
| commit | 0a06f599c8dc7da61577a1817b9a04b7acb46f5c (patch) | |
| tree | 544ad99b9d7923333e233cb84a7ad10801587edb | |
| parent | b11dcb6cf569a0c75466f92da7628b82039fe2fa (diff) | |
| download | linux-stable-0a06f599c8dc7da61577a1817b9a04b7acb46f5c.tar.gz linux-stable-0a06f599c8dc7da61577a1817b9a04b7acb46f5c.tar.bz2 linux-stable-0a06f599c8dc7da61577a1817b9a04b7acb46f5c.zip | |
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 <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>
| -rw-r--r-- | drivers/devfreq/tegra-devfreq.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c index fe9dce0245bf..a20267d93f8a 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 }, |