linux-kernel - [PATCH 3.10 126/173] 9p: send uevent after adding/removing mount

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Date:	Mon,  2 Dec 2013 11:11:49 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Michael Marineau <michael.marineau@...eos.com>,
	Eric Van Hensbergen <ericvh@...il.com>
Subject: [PATCH 3.10 126/173] 9p: send uevent after adding/removing mount_tag attribute

3.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Michael Marineau <michael.marineau@...eos.com>

commit e0d6cb9cd3a3ac8a3b8e5b22b83c4f8619786f22 upstream.

This driver adds an attribute to the existing virtio device so a CHANGE
event is required in order udev rules to make use of it. The ADD event
happens before this driver is probed and unlike a more typical driver
like a block device there isn't a higher level device to watch for.

Signed-off-by: Michael Marineau <michael.marineau@...eos.com>
Signed-off-by: Eric Van Hensbergen <ericvh@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/9p/trans_virtio.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -577,6 +577,10 @@ static int p9_virtio_probe(struct virtio
 	mutex_lock(&virtio_9p_lock);
 	list_add_tail(&chan->chan_list, &virtio_chan_list);
 	mutex_unlock(&virtio_9p_lock);
+
+	/* Let udev rules use the new mount_tag attribute. */
+	kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);
+
 	return 0;
 
 out_free_tag:
@@ -654,6 +658,7 @@ static void p9_virtio_remove(struct virt
 	list_del(&chan->chan_list);
 	mutex_unlock(&virtio_9p_lock);
 	sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
+	kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);
 	kfree(chan->tag);
 	kfree(chan->vc_wq);
 	kfree(chan);


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