linux-kernel - [PATCH] rpmsg: virtio_rpmsg_bus: fix announce for devices without endpoint

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Date:   Fri, 2 Jun 2017 13:35:51 +0200
From:   Henri Roosen <henri.roosen@...zinger.com>
To:     <linux-remoteproc@...r.kernel.org>
CC:     Henri Roosen <henri.roosen@...zinger.com>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] rpmsg: virtio_rpmsg_bus: fix announce for devices without endpoint

A device might not have an endpoint assigned. This patch checks if
rpdev->ept has a value before dereferencing or using it.

Signed-off-by: Henri Roosen <henri.roosen@...zinger.com>
---
 drivers/rpmsg/virtio_rpmsg_bus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 5e66e081..3c582f2 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -314,7 +314,7 @@ static int virtio_rpmsg_announce_create(struct rpmsg_device *rpdev)
 	int err = 0;
 
 	/* need to tell remote processor's name service about this channel ? */
-	if (rpdev->announce &&
+	if (rpdev->announce && rpdev->ept &&
 	    virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
 		struct rpmsg_ns_msg nsm;
 
@@ -338,7 +338,7 @@ static int virtio_rpmsg_announce_destroy(struct rpmsg_device *rpdev)
 	int err = 0;
 
 	/* tell remote processor's name service we're removing this channel */
-	if (rpdev->announce &&
+	if (rpdev->announce && rpdev->ept &&
 	    virtio_has_feature(vrp->vdev, VIRTIO_RPMSG_F_NS)) {
 		struct rpmsg_ns_msg nsm;
 
-- 
2.1.4