[PATCH] sysfs: (driver/block) if show/store is missing return -EIO
sysfs: fix drivers/block so if an attribute doesn't implement
show or store method read/write will return -EIO
instead of 0 or -EINVAL.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/block/genhd.c b/drivers/block/genhd.c
index 8bbe01d..53f7d84 100644
--- a/drivers/block/genhd.c
+++ b/drivers/block/genhd.c
@@ -322,7 +322,7 @@
struct gendisk *disk = to_disk(kobj);
struct disk_attribute *disk_attr =
container_of(attr,struct disk_attribute,attr);
- ssize_t ret = 0;
+ ssize_t ret = -EIO;
if (disk_attr->show)
ret = disk_attr->show(disk,page);