From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Fri, 1 Mar 2019 16:27:59 +0100
Subject: can: flexcan: flexcan_mailbox_read() make use of flexcan_write64() to
 mark the mailbox as read

Git-commit: b9468ad8ff65e6dcfeb69cab15deecafdb883643
Patch-mainline: v5.5-rc1
References: jsc#SLE-12251

In the previous patch the function flexcan_write64() was introduced.

This patch replaces the open coded variant in flexcan_mailbox_read()
that marks a mailbox as read, by a single call to flexcan_write64().

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Mian Yousaf Kaukab <ykaukab@suse.de>
---
 drivers/net/can/flexcan.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 79696430dedf..a929cdda9ab2 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -883,15 +883,10 @@ static struct sk_buff *flexcan_mailbox_read(struct can_rx_offload *offload,
 	}
 
  mark_as_read:
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
-		/* Clear IRQ */
-		if (n < 32)
-			priv->write(BIT(n), &regs->iflag1);
-		else
-			priv->write(BIT(n - 32), &regs->iflag2);
-	} else {
+	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
+		flexcan_write64(priv, FLEXCAN_IFLAG_MB(n), &regs->iflag1);
+	else
 		priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->iflag1);
-	}
 
 	/* Read the Free Running Timer. It is optional but recommended
 	 * to unlock Mailbox as soon as possible and make it available
-- 
2.26.2