From: Nikita Zhandarovich n.zhandarovich@fintech.ru
[ Upstream commit e5d1c8722083f0332dcd3c85fa1273d85fb6bed8 ]
Currently, while calculating residency and latency values, right operands may overflow if resulting values are big enough.
To prevent this, albeit unlikely case, play it safe and convert right operands to left ones' type s64.
Found by Linux Verification Center (linuxtesting.org) with static analysis tool SVACE.
Fixes: 30f604283e05 ("PM / Domains: Allow domain power states to be read from DT") Signed-off-by: Nikita Zhandarovich n.zhandarovich@fintech.ru Acked-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/base/power/domain.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index e865aa4b25047..b32d3cf4f670d 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -2433,10 +2433,10 @@ static int genpd_parse_state(struct genpd_power_state *genpd_state,
err = of_property_read_u32(state_node, "min-residency-us", &residency); if (!err) - genpd_state->residency_ns = 1000 * residency; + genpd_state->residency_ns = 1000LL * residency;
- genpd_state->power_on_latency_ns = 1000 * exit_latency; - genpd_state->power_off_latency_ns = 1000 * entry_latency; + genpd_state->power_on_latency_ns = 1000LL * exit_latency; + genpd_state->power_off_latency_ns = 1000LL * entry_latency; genpd_state->fwnode = &state_node->fwnode;
return 0;