On Thursday, August 09, 2012, Rajendra Nayak wrote:
> On OMAP4, if the first CPU fails to get a valid frequency table (this
> could happen if the platform does not register any OPP table), the
> subsequent CPU instances end up dealing with a NULL freq_table and
> crash.
>
> Check for an already existing freq_table, before trying to create one,
> and increment the freq_table_users only if the table is sucessfully
> created.
>
> Signed-off-by: Rajendra Nayak <rnayak@xxxxxx>
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
> Cc: <linux-pm@xxxxxxxxxxxxxxx>
Kevin, are you going to merge this?
Rafael
> ---
> drivers/cpufreq/omap-cpufreq.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c
> index 17fa04d..b47034e 100644
> --- a/drivers/cpufreq/omap-cpufreq.c
> +++ b/drivers/cpufreq/omap-cpufreq.c
> @@ -218,7 +218,7 @@ static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy)
>
> policy->cur = policy->min = policy->max = omap_getspeed(policy->cpu);
>
> - if (atomic_inc_return(&freq_table_users) == 1)
> + if (!freq_table)
> result = opp_init_cpufreq_table(mpu_dev, &freq_table);
>
> if (result) {
> @@ -227,6 +227,8 @@ static int __cpuinit omap_cpu_init(struct cpufreq_policy *policy)
> goto fail_ck;
> }
>
> + atomic_inc_return(&freq_table_users);
> +
> result = cpufreq_frequency_table_cpuinfo(policy, freq_table);
> if (result)
> goto fail_table;
>
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