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authorViresh Kumar <viresh.kumar@linaro.org>2014-03-28 19:11:46 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-04-07 14:43:49 +0200
commit71508a1f4f2286eea728a5994f1fb14b77340b47 (patch)
tree7cac28dfabc7182c562f185919fe66c2e4f363ce /drivers/cpufreq/powernow-k8.c
parentae87f10f35f75deb8f74dbd92d062200932c2f26 (diff)
downloadleg-kernel-71508a1f4f2286eea728a5994f1fb14b77340b47.tar.gz
cpufreq: use kzalloc() to allocate memory for cpufreq_frequency_table
Few drivers are using kmalloc() to allocate memory for frequency tables and since we will have an additional field '.flags' in 'struct cpufreq_frequency_table', these might become unstable. Better get these fixed by replacing kmalloc() by kzalloc() instead. Along with that we also remove use of .driver_data from SPEAr driver as it doesn't use it at all. Also, writing zero to .driver_data is not required for powernow-k8 as it is already zero. Reported-and-reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/powernow-k8.c')
-rw-r--r--drivers/cpufreq/powernow-k8.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 770a9e1b3468..1b6ae6b57c11 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -623,7 +623,7 @@ static int fill_powernow_table(struct powernow_k8_data *data,
if (check_pst_table(data, pst, maxvid))
return -EINVAL;
- powernow_table = kmalloc((sizeof(*powernow_table)
+ powernow_table = kzalloc((sizeof(*powernow_table)
* (data->numps + 1)), GFP_KERNEL);
if (!powernow_table) {
printk(KERN_ERR PFX "powernow_table memory alloc failure\n");
@@ -793,7 +793,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
}
/* fill in data->powernow_table */
- powernow_table = kmalloc((sizeof(*powernow_table)
+ powernow_table = kzalloc((sizeof(*powernow_table)
* (data->acpi_data.state_count + 1)), GFP_KERNEL);
if (!powernow_table) {
pr_debug("powernow_table memory alloc failure\n");
@@ -810,7 +810,6 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
powernow_table[data->acpi_data.state_count].frequency =
CPUFREQ_TABLE_END;
- powernow_table[data->acpi_data.state_count].driver_data = 0;
data->powernow_table = powernow_table;
if (cpumask_first(cpu_core_mask(data->cpu)) == data->cpu)