[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, 1 insertions, 1 deletions

diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 5febd6d8b885..90d51b179abe 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -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);
 }