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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/thermal/power_allocator.c b/drivers/thermal/power_allocator.c
index 1246aa6fcab0..2f1a863a8e15 100644
--- a/drivers/thermal/power_allocator.c
+++ b/drivers/thermal/power_allocator.c
@@ -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);