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authorRobert Tivy <rtivy@ti.com>2013-04-05 17:38:52 +0300
committerOhad Ben-Cohen <ohad@wizery.com>2013-04-15 09:14:09 +0300
commit1aa7d6a5d0e4c301a7f497d3be26bb7acd749423 (patch)
treeecf051e2214ec05442e8e00d05abb4648f9f65f6 /drivers/rpmsg
parentf6161aa153581da4a3867a2d1a7caf4be19b6ec9 (diff)
downloadlinux-linaro-stable-1aa7d6a5d0e4c301a7f497d3be26bb7acd749423.tar.gz
rpmsg: process _all_ pending messages in rpmsg_recv_done
Change virtqueue callback function rpmsg_recv_done() to process all available messages instead of just one message. Signed-off-by: Robert Tivy <rtivy@ti.com> [split _recv function instead of adding indentation] Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Diffstat (limited to 'drivers/rpmsg')
-rw-r--r--drivers/rpmsg/virtio_rpmsg_bus.c49
1 files changed, 35 insertions, 14 deletions
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index a59684b5fc68..07d5ea2ac77a 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_buf(vrp->rvq, &sg, 0, 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);
}
/*