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cpufreq: OMAP: Handle missing frequency table on SMP systems

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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@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: <linux-pm@vger.kernel.org>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Rajendra Nayak 2012-08-09 12:38:21 +05:30 committed by Kevin Hilman
parent 5b6e3eb576
commit 1b86521423
1 changed files with 3 additions and 1 deletions
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4
drivers/cpufreq/omap-cpufreq.c
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@ -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;