Make it possible to match rpmsg devices based on device tree node, in
addition to the id table. In some of these cases the rpmsg driver would
not have a id_table, so make this optional.

Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org>
---
 drivers/rpmsg/virtio_rpmsg_bus.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 4a4374cc6a59..495fa0a282d3 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -33,6 +33,7 @@
 #include <linux/wait.h>
 #include <linux/rpmsg.h>
 #include <linux/mutex.h>
+#include <linux/of_device.h>
 
 /**
  * struct virtproc_info - virtual remote processor state
@@ -175,11 +176,12 @@ static int rpmsg_dev_match(struct device *dev, struct 
device_driver *drv)
        const struct rpmsg_device_id *ids = rpdrv->id_table;
        unsigned int i;
 
-       for (i = 0; ids[i].name[0]; i++)
-               if (rpmsg_id_match(rpdev, &ids[i]))
-                       return 1;
+       if (ids)
+               for (i = 0; ids[i].name[0]; i++)
+                       if (rpmsg_id_match(rpdev, &ids[i]))
+                               return 1;
 
-       return 0;
+       return of_driver_match_device(dev, drv);
 }
 
 static int rpmsg_uevent(struct device *dev, struct kobj_uevent_env *env)
-- 
2.5.0

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