| Message ID | 20200824210252.27486-2-ionela.voinescu@arm.com |
|---|---|
| State | Accepted |
| Commit | 0a10d3fe3e5c601031676e81b41fb2977650b4d4 |
| Headers | show |
| Series | [v3,1/5] arch_topology: validate input frequencies to arch_set_freq_scale() | expand |
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c index 75f72d684294..1aca82fcceb8 100644 --- a/drivers/base/arch_topology.c +++ b/drivers/base/arch_topology.c @@ -33,6 +33,9 @@ void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq, unsigned long scale; int i; + if (!cur_freq || !max_freq) + return; + /* * If the use of counters for FIE is enabled, just return as we don't * want to update the scale factor with information from CPUFREQ.
The current frequency passed to arch_set_freq_scale() could end up being 0, signaling an error in setting a new frequency. Also, if the maximum frequency in 0, this will result in a division by 0 error. Therefore, validate these input values before using them for the setting of the frequency scale factor. Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> --- drivers/base/arch_topology.c | 3 +++ 1 file changed, 3 insertions(+)