[PATCH v2 15/15] drivers: firmware: xilinx: Use mbox_ring_doorbell() instead of NULL message

[Douglas Anderson]

As per the patch ("mailbox: Deprecate NULL mbox messages; Introduce
mbox_ring_doorbell()"), we want to switch all users of NULL mailbox
messages to use mbox_ring_doorbell().

This client only ever sent NULL messages, so the transition is
straightforward. We can remove the call to mbox_client_txdone(). The
call didn't do anything for NULL messages and it's now officially
documented not to be called for doorbells.

Signed-off-by: Douglas Anderson <dianders at chromium.org>
---

(no changes since v1)

 drivers/soc/xilinx/zynqmp_power.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/xilinx/zynqmp_power.c b/drivers/soc/xilinx/zynqmp_power.c
index 9b7b2858b22a..7d8e311fcdc7 100644
--- a/drivers/soc/xilinx/zynqmp_power.c
+++ b/drivers/soc/xilinx/zynqmp_power.c
@@ -144,7 +144,7 @@ static void ipi_receive_callback(struct mbox_client *cl, void *data)
 			   &zynqmp_pm_init_suspend_work->callback_work);
 
 		/* Send NULL message to mbox controller to ack the message */
-		ret = mbox_send_message(rx_chan, NULL);
+		ret = mbox_ring_doorbell(rx_chan);
 		if (ret)
 			pr_err("IPI ack failed. Error %d\n", ret);
 	}
-- 
2.53.0.rc2.204.g2597b5adb4-goog