[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/acpi/scan.c b/drivers/acpi/scan.c
index 119c940..e858855 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -65,14 +65,14 @@
{
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 = {