[RFC PATCH 16/22] samples/rpmsg: Wait for address to be bound to rpdev for sending message
From: Kishon Vijay Abraham I <hidden>
Date: 2020-07-02 08:24:02
Also in:
kvm, linux-doc, linux-pci, linux-remoteproc, lkml, virtualization
Subsystem:
remote processor messaging (rpmsg) subsystem, the rest · Maintainers:
Bjorn Andersson, Mathieu Poirier, Linus Torvalds
rpmsg_client_sample can use either virtio_rpmsg_bus or vhost_rpmsg_bus to send messages. In the case of vhost_rpmsg_bus, the destination address of rpdev will be assigned only after receiving address service notification from the remote virtio_rpmsg_bus. Wait for address to be bound to rpdev (rpmsg_client_sample running in vhost system) before sending messages to the remote virtio_rpmsg_bus. Signed-off-by: Kishon Vijay Abraham I <redacted> --- samples/rpmsg/rpmsg_client_sample.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/samples/rpmsg/rpmsg_client_sample.c b/samples/rpmsg/rpmsg_client_sample.c
index 514a51945d69..07149d7fbd0c 100644
--- a/samples/rpmsg/rpmsg_client_sample.c
+++ b/samples/rpmsg/rpmsg_client_sample.c@@ -57,10 +57,14 @@ static void rpmsg_sample_send_msg_work(struct work_struct *work) struct rpmsg_device *rpdev = idata->rpdev; int ret; - /* send a message to our remote processor */ - ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG)); - if (ret) - dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret); + if (rpdev->dst != RPMSG_ADDR_ANY) { + /* send a message to our remote processor */ + ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG)); + if (ret) + dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret); + } else { + schedule_delayed_work(&idata->send_msg_work, msecs_to_jiffies(50)); + } } static int rpmsg_sample_probe(struct rpmsg_device *rpdev)
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2.17.1