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

[ Upstream commit 3e74ec2 ]

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: dacbb35 ("rpmsg: glink: Receive and store the remote intent buffers")
Signed-off-by: Bjorn Andersson <[email protected]>
Reviewed-by: Chris Lew <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sasha Levin <[email protected]>

Author: quic-bjorande

drivers/rpmsg/qcom_glink_native.c

@@ -929,6 +929,7 @@ 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;
 	}