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authorBjorn Andersson <bjorn.andersson@linaro.org>2018-03-28 00:06:43 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2018-03-28 07:54:37 +0300
commit0d72038c303c616a63415a07366f916b5edc3830 (patch)
treed60d29f1df47131c6c1592e5cac21e664276e6d6 /drivers/rpmsg
parent7586516ca043d55ed1ca563df72bc216c948cad4 (diff)
downloadlinux-0d72038c303c616a63415a07366f916b5edc3830.tar.xz
rpmsg: smd: Use announce_create to process any receive work
It is possible that incoming data arrives before the client driver has reached a point in the probe method where adequate context for handling the incoming message has been established. In the event that the client's callback function returns an error the message will be left on the FIFO and by invoking the receive handler after the device has been probed the message will be picked off the FIFO and the callback invoked again. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/rpmsg')
-rw-r--r--drivers/rpmsg/qcom_smd.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/rpmsg/qcom_smd.c b/drivers/rpmsg/qcom_smd.c
index 35089039a335..5ce9bf7b897d 100644
--- a/drivers/rpmsg/qcom_smd.c
+++ b/drivers/rpmsg/qcom_smd.c
@@ -997,8 +997,26 @@ static struct device_node *qcom_smd_match_channel(struct device_node *edge_node,
return NULL;
}
+static int qcom_smd_announce_create(struct rpmsg_device *rpdev)
+{
+ struct qcom_smd_endpoint *qept = to_smd_endpoint(rpdev->ept);
+ struct qcom_smd_channel *channel = qept->qsch;
+ unsigned long flags;
+ bool kick_state;
+
+ spin_lock_irqsave(&channel->recv_lock, flags);
+ kick_state = qcom_smd_channel_intr(channel);
+ spin_unlock_irqrestore(&channel->recv_lock, flags);
+
+ if (kick_state)
+ schedule_work(&channel->edge->state_work);
+
+ return 0;
+}
+
static const struct rpmsg_device_ops qcom_smd_device_ops = {
.create_ept = qcom_smd_create_ept,
+ .announce_create = qcom_smd_announce_create,
};
static const struct rpmsg_endpoint_ops qcom_smd_endpoint_ops = {