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authorDmitry Osipenko <digetx@gmail.com>2019-11-05 00:56:03 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-10-01 21:40:02 +0300
commit0a06f599c8dc7da61577a1817b9a04b7acb46f5c (patch)
tree544ad99b9d7923333e233cb84a7ad10801587edb /drivers/devfreq
parentb11dcb6cf569a0c75466f92da7628b82039fe2fa (diff)
downloadlinux-0a06f599c8dc7da61577a1817b9a04b7acb46f5c.tar.xz
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>
Diffstat (limited to 'drivers/devfreq')
-rw-r--r--drivers/devfreq/tegra-devfreq.c4
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 },