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thermal: power_allocator: req_range multiplication should be a 64 bit type 

req_range is declared as a u64 to cope with overflows in the
multiplication of two u32.  As both req_power and power_range are u32,
we need to make sure the multiplication is done with u64 types.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
hifive-unleashed-5.1
Javi Merino 2016-04-06 19:30:18 +01:00 committed by Eduardo Valentin
parent c0ff8aaae3
commit f9d038144a
1 changed files with 1 additions and 1 deletions
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drivers/thermal/power_allocator.c
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@ -301,7 +301,7 @@ static void divvy_up_power(u32 *req_power, u32 *max_power, int num_actors,
capped_extra_power = 0;
extra_power = 0;
for (i = 0; i < num_actors; i++) {
u64 req_range = req_power[i] * power_range;
u64 req_range = (u64)req_power[i] * power_range;
granted_power[i] = DIV_ROUND_CLOSEST_ULL(req_range,
total_req_power);