[PATCH] firmware: arm_scmi: Avoid to call mbox_client_txdone on txdone_irq mode

[Pin-Chuan Liu]

On txdone_irq mode, tx_tick is done from mbox_chan_txdone.
Calling to mbox_client_txdone could get error message
and return directly, add a check to avoid this.

Signed-off-by: Pin-Chuan Liu <flash.liu@xxxxxxxxxxxx>
Change-Id: Iacbe0d36ef9cc16974c013c3e94c47dc79eae52b
---
 drivers/firmware/arm_scmi/mailbox.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/arm_scmi/mailbox.c b/drivers/firmware/arm_scmi/mailbox.c
index b8d470417e8f..f6fe801c2e34 100644
--- a/drivers/firmware/arm_scmi/mailbox.c
+++ b/drivers/firmware/arm_scmi/mailbox.c
@@ -8,6 +8,7 @@
 
 #include <linux/err.h>
 #include <linux/device.h>
+#include <linux/mailbox_controller.h>
 #include <linux/mailbox_client.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
@@ -275,7 +276,12 @@ static void mailbox_mark_txdone(struct scmi_chan_info *cinfo, int ret,
 	 * Unfortunately, we have to kick the mailbox framework after we have
 	 * received our message.
 	 */
-	mbox_client_txdone(smbox->chan, ret);
+
+	/*
+	 * With txdone_irq mode, kick can be done by mbox_chan_txdone.
+	 */
+	if (!(smbox->chan->mbox->txdone_irq))
+		mbox_client_txdone(smbox->chan, ret);
 }
 
 static void mailbox_fetch_response(struct scmi_chan_info *cinfo,
-- 
2.18.0