3 files changed, 44 insertions, 14 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index eeae5a7bdb88..e73c374483cb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6716,6 +6716,14 @@ F:	drivers/remoteproc/
 F:      Documentation/remoteproc.txt
 F:      include/linux/remoteproc.h
 
+REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM
+M:      Ohad Ben-Cohen <ohad@wizery.com>
+T:      git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg.git
+S:      Maintained
+F:      drivers/rpmsg/
+F:      Documentation/rpmsg.txt
+F:      include/linux/rpmsg.h
+
 RFKILL
 M:      Johannes Berg <johannes@sipsolutions.net>
 L:      linux-wireless@vger.kernel.org
diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig
index f6e0ea6ffda5..69a219387582 100644
--- a/drivers/rpmsg/Kconfig
+++ b/drivers/rpmsg/Kconfig
@@ -4,5 +4,6 @@ menu "Rpmsg drivers"
 config RPMSG
         tristate
         select VIRTIO
+        select VIRTUALIZATION
 
 endmenu
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 56fceafec9ec..b6135d4d54eb 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -776,23 +776,13 @@ out:
 }
 EXPORT_SYMBOL(rpmsg_send_offchannel_raw);
 
-/* called when an rx buffer is used, and it's time to digest a message */
-static void rpmsg_recv_done(struct virtqueue *rvq)
+static int rpmsg_recv_single(struct virtproc_info *vrp, struct device *dev,
+                             struct rpmsg_hdr *msg, unsigned int len)
 {
-        struct rpmsg_hdr *msg;
-        unsigned int len;
         struct rpmsg_endpoint *ept;
         struct scatterlist sg;
-        struct virtproc_info *vrp = rvq->vdev->priv;
-        struct device *dev = &rvq->vdev->dev;
         int err;
 
-        msg = virtqueue_get_buf(rvq, &len);
-        if (!msg) {
-                dev_err(dev, "uhm, incoming signal, but no used buffer ?\n");
-                return;
-        }
-
         dev_dbg(dev, "From: 0x%x, To: 0x%x, Len: %d, Flags: %d, Reserved: %d\n",
                                         msg->src, msg->dst, msg->len,
                                         msg->flags, msg->reserved);
@@ -806,7 +796,7 @@ static void rpmsg_recv_done(struct virtqueue *rvq)
         if (len > RPMSG_BUF_SIZE ||
                 msg->len > (len - sizeof(struct rpmsg_hdr))) {
                 dev_warn(dev, "inbound msg too big: (%d, %d)\n", len, msg->len);
-                return;
+                return -EINVAL;
         }
 
         /* use the dst addr to fetch the callback of the appropriate user */
@@ -842,11 +832,42 @@ static void rpmsg_recv_done(struct virtqueue *rvq)
         err = virtqueue_add_inbuf(vrp->rvq, &sg, 1, msg, GFP_KERNEL);
         if (err < 0) {
                 dev_err(dev, "failed to add a virtqueue buffer: %d\n", err);
+                return err;
+        }
+
+        return 0;
+}
+
+/* called when an rx buffer is used, and it's time to digest a message */
+static void rpmsg_recv_done(struct virtqueue *rvq)
+{
+        struct virtproc_info *vrp = rvq->vdev->priv;
+        struct device *dev = &rvq->vdev->dev;
+        struct rpmsg_hdr *msg;
+        unsigned int len, msgs_received = 0;
+        int err;
+
+        msg = virtqueue_get_buf(rvq, &len);
+        if (!msg) {
+                dev_err(dev, "uhm, incoming signal, but no used buffer ?\n");
                 return;
         }
 
+        while (msg) {
+                err = rpmsg_recv_single(vrp, dev, msg, len);
+                if (err)
+                        break;
+
+                msgs_received++;
+
+                msg = virtqueue_get_buf(rvq, &len);
+        };
+
+        dev_dbg(dev, "Received %u messages\n", msgs_received);
+
         /* tell the remote processor we added another available rx buffer */
-        virtqueue_kick(vrp->rvq);
+        if (msgs_received)
+                virtqueue_kick(vrp->rvq);
 }
 
 /*