From: Dmitry Osipenko <digetx@xxxxxxxxx>
[ 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@xxxxxxxxxxx>
Tested-by: Peter Geis <pgwipeout@xxxxxxxxx>
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/devfreq/tegra-devfreq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
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 },
--
2.25.1
