mailbox: mhu: Acknowledge the interrupt only after data is pushed

According to the mailbox documentation the controller should ACK
the RX only after it has finished pushing the data up the link.

Signed-off-by: Punit Agrawal <Punit.Agrawal@arm.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>

diff --git a/drivers/mailbox/arm_mhu.c b/drivers/mailbox/arm_mhu.c
index 8c87c22..3e7e0e0 100644 (file)
--- a/drivers/mailbox/arm_mhu.c
+++ b/drivers/mailbox/arm_mhu.c
@@ -137,8 +137,8 @@ static irqreturn_t mbox_handler(int irq, void *p)
                               ctlr->payload_base + RX_PAYLOAD(idx),
                               data->rx_size);
                chan->data = NULL;
-               writel(~0, ctlr->mbox_base + RX_CLEAR(idx));
                mbox_link_received_data(p, data);
+               writel(~0, ctlr->mbox_base + RX_CLEAR(idx));
        }
 
        return IRQ_HANDLED;