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| author | Javi Merino <javi.merino@arm.com> | 2016-04-06 19:30:18 +0100 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2016-04-20 16:22:45 -0700 |
| commit | f9d038144a171d42e057143b247ff7a12a5b06f5 (patch) | |
| tree | f369a61f4a975566158427a691cc509e6d3e9cb2 | |
| parent | c0ff8aaae369559fbef0e9f2606a9ae92db14f2f (diff) | |
| download | linux-f9d038144a171d42e057143b247ff7a12a5b06f5.tar.gz linux-f9d038144a171d42e057143b247ff7a12a5b06f5.tar.xz | |
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>
| -rw-r--r-- | drivers/thermal/power_allocator.c | 2 |
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); |