[PATCH 13/15] aoeblk: Pass attribute group to device_add_disk

Fam Zheng
2016-08-17T07:15:13Z

Previously after device_add_disk returns, the KOBJ_ADD uevent is already
emitted. Adding attributes after that is a poor usage of kobject, and
in practice may result in race conditions with userspace, for
example udev checks availability of certain attributes and initializes
/dev entries conditionally.

device_add_disk can handle adding attribute group better, so use it.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
drivers/block/aoe/aoeblk.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 4edfff2..d1b7541 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -177,7 +177,7 @@ static struct attribute *aoe_attrs[] = {
NULL,
};

-static const struct attribute_group attr_group = {
+static struct attribute_group attr_group = {
.attrs = aoe_attrs,
};

@@ -219,11 +219,6 @@ aoedisk_rm_debugfs(struct aoedev *d)
d->debugfs = NULL;
}

-static int
-aoedisk_add_sysfs(struct aoedev *d)
-{
- return sysfs_create_group(&disk_to_dev(d->gd)->kobj, &attr_group);
-}
void
aoedisk_rm_sysfs(struct aoedev *d)
{
@@ -417,8 +412,7 @@ aoeblk_gdalloc(void *vp)

spin_unlock_irqrestore(&d->lock, flags);

- device_add_disk(NULL, gd, NULL);
- aoedisk_add_sysfs(d);
+ device_add_disk(NULL, gd, &attr_group);
aoedisk_add_debugfs(d);

spin_lock_irqsave(&d->lock, flags);
--
2.7.4