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cpufreq: interactive: Add error checking on sysfs interfaces

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This adds better error checking on tunable parameters on sysfs
interfaces.  Also fixes return value from these functions, previously
on success they would return 0 which would cause a infinite loop.

Change-Id: Ic05038492166f8673d007202092471f98a2f0dfa
Signed-off-by: Allen Martin <amartin@nvidia.com>
This commit is contained in:
Allen Martin
2011-06-30 16:59:19 -07:00
committed by Todd Poynor
parent 80e65d97d2
commit 8b12552d24
1 changed files with 16 additions and 2 deletions
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18
drivers/cpufreq/cpufreq_interactive.c
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@@ -394,7 +394,14 @@ static ssize_t show_go_maxspeed_load(struct kobject *kobj,
static ssize_t store_go_maxspeed_load(struct kobject *kobj,
struct attribute *attr, const char *buf, size_t count)
{
return strict_strtoul(buf, 0, &go_maxspeed_load);
int ret;
unsigned long val;
ret = strict_strtoul(buf, 0, &val);
if (ret < 0)
return ret;
go_maxspeed_load = val;
return count;
}
static struct global_attr go_maxspeed_load_attr = __ATTR(go_maxspeed_load, 0644,
@@ -409,7 +416,14 @@ static ssize_t show_min_sample_time(struct kobject *kobj,
static ssize_t store_min_sample_time(struct kobject *kobj,
struct attribute *attr, const char *buf, size_t count)
{
return strict_strtoul(buf, 0, &min_sample_time);
int ret;
unsigned long val;
ret = strict_strtoul(buf, 0, &val);
if (ret < 0)
return ret;
min_sample_time = val;
return count;
}
static struct global_attr min_sample_time_attr = __ATTR(min_sample_time, 0644,