diff mbox

[v2,1/9] can: at91_can: don't copy data to rx'ed RTR frames

Message ID 1293296117-27624-2-git-send-email-mkl@pengutronix.de
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Marc Kleine-Budde Dec. 25, 2010, 4:55 p.m. UTC 
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
---
 drivers/net/can/at91_can.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
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Patch

diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 7ef83d0..53c6598 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -491,12 +491,14 @@  static void at91_read_mb(struct net_device *dev, unsigned int mb,
 		cf->can_id = (reg_mid >> 18) & CAN_SFF_MASK;
 
 	reg_msr = at91_read(priv, AT91_MSR(mb));
-	if (reg_msr & AT91_MSR_MRTR)
-		cf->can_id |= CAN_RTR_FLAG;
 	cf->can_dlc = get_can_dlc((reg_msr >> 16) & 0xf);
 
-	*(u32 *)(cf->data + 0) = at91_read(priv, AT91_MDL(mb));
-	*(u32 *)(cf->data + 4) = at91_read(priv, AT91_MDH(mb));
+	if (reg_msr & AT91_MSR_MRTR)
+		cf->can_id |= CAN_RTR_FLAG;
+	else {
+		*(u32 *)(cf->data + 0) = at91_read(priv, AT91_MDL(mb));
+		*(u32 *)(cf->data + 4) = at91_read(priv, AT91_MDH(mb));
+	}
 
 	/* allow RX of extended frames */
 	at91_write(priv, AT91_MID(mb), AT91_MID_MIDE);