Commit 70f2817a authored by Dmitry Torokhov's avatar Dmitry Torokhov Committed by Greg Kroah-Hartman
Browse files

[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: default avatarDmitry Torokhov <dtor@mail.ru>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 6c1852a0
......@@ -65,14 +65,14 @@ static ssize_t acpi_device_attr_show(struct kobject *kobj,
{
struct acpi_device *device = to_acpi_device(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
return attribute->show ? attribute->show(device, buf) : 0;
return attribute->show ? attribute->show(device, buf) : -EIO;
}
static ssize_t acpi_device_attr_store(struct kobject *kobj,
struct attribute *attr, const char *buf, size_t len)
{
struct acpi_device *device = to_acpi_device(kobj);
struct acpi_device_attribute *attribute = to_handle_attr(attr);
return attribute->store ? attribute->store(device, buf, len) : len;
return attribute->store ? attribute->store(device, buf, len) : -EIO;
}
static struct sysfs_ops acpi_device_sysfs_ops = {
......
......@@ -521,7 +521,7 @@ static ssize_t show(struct kobject * kobj, struct attribute * attr ,char * buf)
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 @@ static ssize_t store(struct kobject * kobj, struct attribute * attr,
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;
}
......
......@@ -115,7 +115,7 @@ edd_attr_show(struct kobject * kobj, struct attribute *attr, char *buf)
{
struct edd_device *dev = to_edd_device(kobj);
struct edd_attribute *edd_attr = to_edd_attr(attr);
ssize_t ret = 0;
ssize_t ret = -EIO;
if (edd_attr->show)
ret = edd_attr->show(dev, buf);
......
......@@ -352,7 +352,7 @@ static ssize_t efivar_attr_show(struct kobject *kobj, struct attribute *attr,
{
struct efivar_entry *var = to_efivar_entry(kobj);
struct efivar_attribute *efivar_attr = to_efivar_attr(attr);
ssize_t ret = 0;
ssize_t ret = -EIO;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
......@@ -368,7 +368,7 @@ static ssize_t efivar_attr_store(struct kobject *kobj, struct attribute *attr,
{
struct efivar_entry *var = to_efivar_entry(kobj);
struct efivar_attribute *efivar_attr = to_efivar_attr(attr);
ssize_t ret = 0;
ssize_t ret = -EIO;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
......
......@@ -71,7 +71,7 @@ static ssize_t port_attr_show(struct kobject *kobj,
struct ib_port *p = container_of(kobj, struct ib_port, kobj);
if (!port_attr->show)
return 0;
return -EIO;
return port_attr->show(p, port_attr, buf);
}
......
......@@ -629,7 +629,7 @@ static ssize_t module_attr_show(struct kobject *kobj,
mk = to_module_kobject(kobj);
if (!attribute->show)
return -EPERM;
return -EIO;
if (!try_module_get(mk->mod))
return -ENODEV;
......@@ -653,7 +653,7 @@ static ssize_t module_attr_store(struct kobject *kobj,
mk = to_module_kobject(kobj);
if (!attribute->store)
return -EPERM;
return -EIO;
if (!try_module_get(mk->mod))
return -ENODEV;
......
......@@ -155,7 +155,7 @@ seclvl_attr_store(struct kobject *kobj,
struct seclvl_obj *obj = container_of(kobj, struct seclvl_obj, kobj);
struct seclvl_attribute *attribute =
container_of(attr, struct seclvl_attribute, attr);
return (attribute->store ? attribute->store(obj, buf, len) : 0);
return attribute->store ? attribute->store(obj, buf, len) : -EIO;
}
static ssize_t
......@@ -164,7 +164,7 @@ seclvl_attr_show(struct kobject *kobj, struct attribute *attr, char *buf)
struct seclvl_obj *obj = container_of(kobj, struct seclvl_obj, kobj);
struct seclvl_attribute *attribute =
container_of(attr, struct seclvl_attribute, attr);
return (attribute->show ? attribute->show(obj, buf) : 0);
return attribute->show ? attribute->show(obj, buf) : -EIO;
}
/**
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment