Only write a new message to the tx mbox queue if slot is available in
the tx queue. If queue is full, then do not send new mbox notification.

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
---
 drivers/remoteproc/xlnx_r5_remoteproc.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
index c685bb5fa62c..0e71edf8174c 100644
--- a/drivers/remoteproc/xlnx_r5_remoteproc.c
+++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
@@ -381,7 +381,10 @@ static void zynqmp_r5_rproc_kick(struct rproc *rproc, int vqid)
 	int ret;
 
 	ipi = r5_core->ipi;
-	if (!ipi)
+	if (!ipi || !ipi->tx_chan)
+		return;
+
+	if (mbox_chan_tx_slots_available(ipi->tx_chan) == 0)
 		return;
 
 	mb_msg = (struct zynqmp_ipi_message *)ipi->tx_mc_buf;

base-commit: d4d61a4b0a52e8f3cdb3e1578602850a3452ec3e
-- 
2.43.0

On Wed, 26 Aug 2026 at 11:39, Tanmay Shah <tanmay.shah@amd.com> wrote:
>
> Only write a new message to the tx mbox queue if slot is available in
> the tx queue. If queue is full, then do not send new mbox notification.
>
> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
> Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>
> ---
>  drivers/remoteproc/xlnx_r5_remoteproc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>

We are finally closing the loop on this patchset.  I'll pick this up
when RC1 comes out next week.

Thanks,
Mathieu

> diff --git a/drivers/remoteproc/xlnx_r5_remoteproc.c b/drivers/remoteproc/xlnx_r5_remoteproc.c
> index c685bb5fa62c..0e71edf8174c 100644
> --- a/drivers/remoteproc/xlnx_r5_remoteproc.c
> +++ b/drivers/remoteproc/xlnx_r5_remoteproc.c
> @@ -381,7 +381,10 @@ static void zynqmp_r5_rproc_kick(struct rproc *rproc, int vqid)
>         int ret;
>
>         ipi = r5_core->ipi;
> -       if (!ipi)
> +       if (!ipi || !ipi->tx_chan)
> +               return;
> +
> +       if (mbox_chan_tx_slots_available(ipi->tx_chan) == 0)
>                 return;
>
>         mb_msg = (struct zynqmp_ipi_message *)ipi->tx_mc_buf;
>
> base-commit: d4d61a4b0a52e8f3cdb3e1578602850a3452ec3e
> --
> 2.43.0
>