[PATCH 2/7] can: ti_hecc: release the mailbox a bit earlier

[Jeroen Hofstee]

Release the mailbox after reading it, so it can be reused a bit earlier.
Since "can: rx-offload: continue on error" all pending message bits are
cleared directly, so remove clearing them in ti_hecc.

Suggested-by: Marc Kleine-Budde <m...@pengutronix.de>
Signed-off-by: Jeroen Hofstee <jhofs...@victronenergy.com>
---
 drivers/net/can/ti_hecc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/can/ti_hecc.c b/drivers/net/can/ti_hecc.c
index f8b19eef5d26..461c28ab6d66 100644
--- a/drivers/net/can/ti_hecc.c
+++ b/drivers/net/can/ti_hecc.c
@@ -526,8 +526,9 @@ static unsigned int ti_hecc_mailbox_read(struct 
can_rx_offload *offload,
                                         u32 *timestamp, unsigned int mbxno)
 {
        struct ti_hecc_priv *priv = rx_offload_to_priv(offload);
-       u32 data;
+       u32 data, mbx_mask;
 
+       mbx_mask = BIT(mbxno);
        data = hecc_read_mbx(priv, mbxno, HECC_CANMID);
        if (data & HECC_CANMID_IDE)
                cf->can_id = (data & CAN_EFF_MASK) | CAN_EFF_FLAG;
@@ -547,6 +548,7 @@ static unsigned int ti_hecc_mailbox_read(struct 
can_rx_offload *offload,
        }
 
        *timestamp = hecc_read_stamp(priv, mbxno);
+       hecc_write(priv, HECC_CANRMP, mbx_mask);
 
        return 1;
 }
@@ -695,7 +697,6 @@ static irqreturn_t ti_hecc_interrupt(int irq, void *dev_id)
                while ((rx_pending = hecc_read(priv, HECC_CANRMP))) {
                        can_rx_offload_irq_offload_timestamp(&priv->offload,
                                                             rx_pending);
-                       hecc_write(priv, HECC_CANRMP, rx_pending);
                }
        }
 
-- 
2.17.1