[PATCH] sysfs: (rest) if show/store is missing return -EIO
sysfs: fix the rest of the kernel so if an attribute doesn't
implement show or store method read/write will return
-EIO instead of 0 or -EINVAL or -EPERM.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 03b5fb2..bf62dfe 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -521,7 +521,7 @@
policy = cpufreq_cpu_get(policy->cpu);
if (!policy)
return -EINVAL;
- ret = fattr->show ? fattr->show(policy,buf) : 0;
+ ret = fattr->show ? fattr->show(policy,buf) : -EIO;
cpufreq_cpu_put(policy);
return ret;
}
@@ -535,7 +535,7 @@
policy = cpufreq_cpu_get(policy->cpu);
if (!policy)
return -EINVAL;
- ret = fattr->store ? fattr->store(policy,buf,count) : 0;
+ ret = fattr->store ? fattr->store(policy,buf,count) : -EIO;
cpufreq_cpu_put(policy);
return ret;
}