rpmsg: glink: Avoid infinite loop on intent for missing channel

In the event that an intent advertisement arrives on an unknown channel
the fifo is not advanced, resulting in the same message being handled
over and over.

Fixes: dacbb35e930f ("rpmsg: glink: Receive and store the remote intent buffers")
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Chris Lew <quic_clew@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230214234231.2069751-1-quic_bjorande@quicinc.com

diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 89c3381f06c331a841b924597d5e855f7162f14b..b6c60bf86009b5f7b0b77d955294e1b2af12466e 100644 (file)
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -966,6 +966,7 @@ static void qcom_glink_handle_intent(struct qcom_glink *glink,
        spin_unlock_irqrestore(&glink->idr_lock, flags);
        if (!channel) {
                dev_err(glink->dev, "intents for non-existing channel\n");
+               qcom_glink_rx_advance(glink, ALIGN(msglen, 8));
                return;
        }