[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/bus.c b/drivers/base/bus.c
index 3cb04bb04c2b..80ce88de56fa 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -36,7 +36,7 @@ drv_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
 {
         struct driver_attribute * drv_attr = to_drv_attr(attr);
         struct device_driver * drv = to_driver(kobj);
-        ssize_t ret = 0;
+        ssize_t ret = -EIO;
 
         if (drv_attr->show)
                 ret = drv_attr->show(drv, buf);
@@ -49,7 +49,7 @@ drv_attr_store(struct kobject * kobj, struct attribute * attr,
 {
         struct driver_attribute * drv_attr = to_drv_attr(attr);
         struct device_driver * drv = to_driver(kobj);
-        ssize_t ret = 0;
+        ssize_t ret = -EIO;
 
         if (drv_attr->store)
                 ret = drv_attr->store(drv, buf, count);