Patch "rpmsg: virtio_rpmsg_bus: fix channel creation" has been added to the 4.9-stable tree

Patch "rpmsg: virtio_rpmsg_bus: fix channel creation" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    rpmsg: virtio_rpmsg_bus: fix channel creation

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rpmsg-virtio_rpmsg_bus-fix-channel-creation.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 63447646ac657fde00bb658ce21a3431940ae0ad Mon Sep 17 00:00:00 2001
From: Loic Pallardy <loic.pallardy@st.com>
Date: Thu, 15 Dec 2016 15:49:56 +0100
Subject: rpmsg: virtio_rpmsg_bus: fix channel creation

From: Loic Pallardy <loic.pallardy@st.com>

commit 63447646ac657fde00bb658ce21a3431940ae0ad upstream.

Since commit 4dffed5b3ac796b ("rpmsg: Name rpmsg devices based on
channel id"), it is no more possible for a firmware to register twice
a service (on different endpoints). rpmsg_register_device function
is failing when calling device_add for the second time as second
device has the same name as first one already register.
It is because name is based only on service name and so is not more
unique. Previously name was unique thanks to the use of rpmsg_dev_index.

This patch adds destination and source endpoint numbers device name to
create an unique identifier.

Fixes: 4dffed5b3ac7 ("rpmsg: Name rpmsg devices based on channel id")
Acked-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Loic Pallardy <loic.pallardy@st.com>
[bjorn: flipped name and address in device name]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/rpmsg/rpmsg_core.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -411,8 +411,8 @@ int rpmsg_register_device(struct rpmsg_d
 	struct device *dev = &rpdev->dev;
 	int ret;
 
-	dev_set_name(&rpdev->dev, "%s:%s",
-		     dev_name(dev->parent), rpdev->id.name);
+	dev_set_name(&rpdev->dev, "%s.%s.%d.%d", dev_name(dev->parent),
+		     rpdev->id.name, rpdev->src, rpdev->dst);
 
 	rpdev->dev.bus = &rpmsg_bus;
 	rpdev->dev.release = rpmsg_release_device;


Patches currently in stable-queue which might be from loic.pallardy@st.com are

queue-4.9/rpmsg-virtio_rpmsg_bus-fix-channel-creation.patch