commit 74ff60b29ec602322178d32cb2a82b24ddb884fc
author Wolfram Sang <w.sang@pengutronix.de> Mon Nov 16 12:57:52 2009 +0000
committer David S. Miller <davem@davemloft.net> Tue Nov 17 03:54:04 2009 -0800
tree a40c1fbec527711284eabfe18d9f50eb097e877f
parent 81593c1cea7afdcd653c77d626aa186993e39c91

net/can/mscan: replace hardcoded values with defines

Not all hardcoded values have been replaced as this made the code quite
unreadable. IMHO this compromise serves the purpose of readability.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/can/mscan/mscan.c

diff --git a/drivers/net/can/mscan/mscan.c b/drivers/net/can/mscan/mscan.c
index 20d1991..263d1a9 100644
--- a/drivers/net/can/mscan/mscan.c
+++ b/drivers/net/can/mscan/mscan.c
@@ -211,18 +211,23 @@
 
 	rtr = frame->can_id & CAN_RTR_FLAG;
 
+	/* RTR is always the lowest bit of interest, then IDs follow */
 	if (frame->can_id & CAN_EFF_FLAG) {
-		can_id = (frame->can_id & CAN_EFF_MASK) << 1;
+		can_id = (frame->can_id & CAN_EFF_MASK)
+			 << (MSCAN_EFF_RTR_SHIFT + 1);
 		if (rtr)
-			can_id |= 1;
+			can_id |= 1 << MSCAN_EFF_RTR_SHIFT;
 		out_be16(&regs->tx.idr3_2, can_id);
 
 		can_id >>= 16;
-		can_id = (can_id & 0x7) | ((can_id << 2) & 0xffe0) | (3 << 3);
+		/* EFF_FLAGS are inbetween the IDs :( */
+		can_id = (can_id & 0x7) | ((can_id << 2) & 0xffe0)
+			 | MSCAN_EFF_FLAGS;
 	} else {
-		can_id = (frame->can_id & CAN_SFF_MASK) << 5;
+		can_id = (frame->can_id & CAN_SFF_MASK)
+			 << (MSCAN_SFF_RTR_SHIFT + 1);
 		if (rtr)
-			can_id |= 1 << 4;
+			can_id |= 1 << MSCAN_SFF_RTR_SHIFT;
 	}
 	out_be16(&regs->tx.idr1_0, can_id);