[CPUFREQ] Check return value of cpufreq_cpu_get in cpufreq_stats
This fixes an issue found in drivers/cpufreq/cpufreq_stats.c by Coverity.
Error reported:
CID: 2642
Checker: NULL_RETURNS (help)
File: /export2/p4-coverity/mc2/linux26/drivers/cpufreq/cpufreq_stats.c
Function: cpufreq_stats_create_table
Description: Dereferencing NULL value "data"
Patch description:
The return of cpufreq_cpu_get can be NULL, check return code and return
-EINVAL if it is NULL.
Signed-off-by: Jayachandran C. <c.jayachandran at gmail.com>
Signed-off-by: Dave Jones <davej@redhat.com>
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index ff16a87..19b4c3e 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -196,6 +196,11 @@
return -ENOMEM;
data = cpufreq_cpu_get(cpu);
+ if (data == NULL) {
+ ret = -EINVAL;
+ goto error_get_fail;
+ }
+
if ((ret = sysfs_create_group(&data->kobj, &stats_attr_group)))
goto error_out;