[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>

1 files changed, 2 insertions, 2 deletions

diff --git a/security/seclvl.c b/security/seclvl.c
index 8a0ab0d7949e..c8e87b22c9bd 100644
--- a/security/seclvl.c
+++ b/security/seclvl.c
@@ -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;
 }
 
 /**