linux-kernel - [PATCH v2 09/12] md: Generate uevent after attribute available

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Message-Id: <20160630015953.6888-10-famz@redhat.com>
Date:	Thu, 30 Jun 2016 09:59:50 +0800
From:	Fam Zheng <famz@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Jens Axboe <axboe@...nel.dk>,
	"Ed L. Cashin" <ed.cashin@....org>, Jiri Kosina <jikos@...nel.org>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Minchan Kim <minchan@...nel.org>,
	Nitin Gupta <ngupta@...are.org>,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Shaohua Li <shli@...nel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	Keith Busch <keith.busch@...el.com>,
	linuxppc-dev@...ts.ozlabs.org, linux-block@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	linux-raid@...r.kernel.org, linux-mmc@...r.kernel.org,
	linux-mtd@...ts.infradead.org, linux-nvme@...ts.infradead.org,
	Christoph Hellwig <hch@...radead.org>, famz@...hat.com
Subject: [PATCH v2 09/12] md: Generate uevent after attribute available

It is documented that KOBJ_ADD should be generated after the object's
attributes and children are ready.  We can achieve this with the new
disk_gen_uevents interface.

Signed-off-by: Fam Zheng <famz@...hat.com>
---
 drivers/md/md.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1391c72..dcd09ea 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -5055,7 +5055,7 @@ static int md_alloc(dev_t dev, char *name)
 	 * through to md_open, so make sure it doesn't get too far
 	 */
 	mutex_lock(&mddev->open_mutex);
-	add_disk(disk, true);
+	add_disk(disk, false);
 
 	error = kobject_init_and_add(&mddev->kobj, &md_ktype,
 				     &disk_to_dev(disk)->kobj, "%s", "md");
@@ -5070,6 +5070,7 @@ static int md_alloc(dev_t dev, char *name)
 	if (mddev->kobj.sd &&
 	    sysfs_create_group(&mddev->kobj, &md_bitmap_group))
 		printk(KERN_DEBUG "pointless warning\n");
+	disk_gen_uevents(disk);
 	mutex_unlock(&mddev->open_mutex);
  abort:
 	mutex_unlock(&disks_mutex);
-- 
2.9.0