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drivers/cpufreq/pcc-cpufreq.c: avoid NULL pointer dereference
[deliverable/linux.git]
/
drivers
/
cpufreq
/
pcc-cpufreq.c
diff --git
a/drivers/cpufreq/pcc-cpufreq.c
b/drivers/cpufreq/pcc-cpufreq.c
index 7b0603eb01297a7088c24d0ab1101e5e9625713b..cdc02ac8f41a7ff5d3f121e2b0927fd8bf99ae7a 100644
(file)
--- a/
drivers/cpufreq/pcc-cpufreq.c
+++ b/
drivers/cpufreq/pcc-cpufreq.c
@@
-261,6
+261,9
@@
static int pcc_get_offset(int cpu)
pr = per_cpu(processors, cpu);
pcc_cpu_data = per_cpu_ptr(pcc_cpu_info, cpu);
+ if (!pr)
+ return -ENODEV;
+
status = acpi_evaluate_object(pr->handle, "PCCP", NULL, &buffer);
if (ACPI_FAILURE(status))
return -ENODEV;
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