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cpufreq: powernv: fix missing check of return value in init_powernv_pstates()

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kmalloc() could fail, so insert a check of its return value. And
if it fails, returns -ENOMEM.

And remove (struct pstate_idx_revmap_data *) to fix coccinelle WARNING
by the way.

WARNING: casting value returned by memory allocation function to (struct
pstate_idx_revmap_data *) is useless.

Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Yangtao Li 2019-02-16 12:06:23 -05:00 committed by Viresh Kumar
parent 2814335cb3
commit 5ae06c237f
1 changed files with 7 additions and 3 deletions
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10
drivers/cpufreq/powernv-cpufreq.c
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@ -244,6 +244,7 @@ static int init_powernv_pstates(void)
u32 len_ids, len_freqs;
u32 pstate_min, pstate_max, pstate_nominal;
u32 pstate_turbo, pstate_ultra_turbo;
int rc = -ENODEV;
power_mgt = of_find_node_by_path("/ibm,opal/power-mgt");
if (!power_mgt) {
@ -327,8 +328,11 @@ next:
powernv_freqs[i].frequency = freq * 1000; /* kHz */
powernv_freqs[i].driver_data = id & 0xFF;
revmap_data = (struct pstate_idx_revmap_data *)
kmalloc(sizeof(*revmap_data), GFP_KERNEL);
revmap_data = kmalloc(sizeof(*revmap_data), GFP_KERNEL);
if (!revmap_data) {
rc = -ENOMEM;
goto out;
}
revmap_data->pstate_id = id & 0xFF;
revmap_data->cpufreq_table_idx = i;
@ -357,7 +361,7 @@ next:
return 0;
out:
of_node_put(power_mgt);
return -ENODEV;
return rc;
}
/* Returns the CPU frequency corresponding to the pstate_id. */