Merge tag 'rpmsg-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg
Pull rpmsg changes from Ohad Ben-Cohen:
"A small pull request consisting of:
- Make rpmsg process all pending messages instead of just one, from
Robert Tivy
- Fix Kconfig dependency on VIRTUALIZATION, from Suman.
Note: this was submitted late during the 3.9 rc cycle and it seemed
appropriate to wait with it for the merge window.
- Belated addition of an rpmsg entry to the MAINTAINERS file. People
seem to look for this"
* tag 'rpmsg-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg:
rpmsg: fix kconfig dependencies for VIRTIO
MAINTAINERS: add rpmsg entry
rpmsg: process _all_ pending messages in rpmsg_recv_done
diff --git a/MAINTAINERS b/MAINTAINERS
index eeae5a7..e73c374 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6716,6 +6716,14 @@
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 f6e0ea6..69a2193 100644
--- a/drivers/rpmsg/Kconfig
+++ b/drivers/rpmsg/Kconfig
@@ -4,5 +4,6 @@
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 56fceaf..b6135d4 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -776,23 +776,13 @@
}
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 @@
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 @@
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);
}
/*
