Re: [PATCH v2] rpmsg: glink: Avoid infinite loop on intent for missing channel

[Chris Lew <quic_clew@quicinc.com>]

On 2/14/2023 3:42 PM, Bjorn Andersson wrote:
> 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>

> ---
> 
> Changes since v1:
> - Don't drop packet if the following memory allocation fails.
> 
>   drivers/rpmsg/qcom_glink_native.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
> index 89c3381f06c3..b6c60bf86009 100644
> --- 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;
>   	}
>   
>