[PATCH] sysfs: (driver/base) if show/store is missing return -EIO

sysfs: fix drivers/base so if an attribute doesn't implement
       show or store method read/write will return -EIO
       instead of 0.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 32f3f09a42e0..a293a788abd4 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -36,7 +36,7 @@ dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
 {
         struct device_attribute * dev_attr = to_dev_attr(attr);
         struct device * dev = to_dev(kobj);
-        ssize_t ret = 0;
+        ssize_t ret = -EIO;
 
         if (dev_attr->show)
                 ret = dev_attr->show(dev, buf);
@@ -49,7 +49,7 @@ dev_attr_store(struct kobject * kobj, struct attribute * attr,
 {
         struct device_attribute * dev_attr = to_dev_attr(attr);
         struct device * dev = to_dev(kobj);
-        ssize_t ret = 0;
+        ssize_t ret = -EIO;
 
         if (dev_attr->store)
                 ret = dev_attr->store(dev, buf, count);