Thread (12 messages) 12 messages, 2 authors, 2012-07-20

Re: [PATCH 5/9] can: janz-ican3: cleanup of ican3_to_can_frame and can_frame_to_ican3

From: Ira W. Snyder <hidden>
Date: 2012-07-20 15:39:37

On Fri, Jul 20, 2012 at 01:11:45PM +0200, Marc Kleine-Budde wrote:
This patch cleans up the ICAN3 to Linux CAN frame and vice versa
conversion functions:

- RX: Use get_can_dlc() to limit the dlc value.
- RX+TX: Don't copy the whole frame, only copy the amount of bytes
  specified in cf->can_dlc.

Cc: Ira W. Snyder <redacted>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
It looks good to me, and works perfectly.

Acked-by: Ira W. Snyder <redacted>
Tested-by: Ira W. Snyder <redacted>
quoted hunk ↗ jump to hunk
 drivers/net/can/janz-ican3.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/can/janz-ican3.c b/drivers/net/can/janz-ican3.c
index 754b803..b19aca5 100644
--- a/drivers/net/can/janz-ican3.c
+++ b/drivers/net/can/janz-ican3.c
@@ -811,10 +811,10 @@ static void ican3_to_can_frame(struct ican3_dev *mod,
 
 		cf->can_id |= desc->data[0] << 3;
 		cf->can_id |= (desc->data[1] & 0xe0) >> 5;
-		cf->can_dlc = desc->data[1] & ICAN3_CAN_DLC_MASK;
-		memcpy(cf->data, &desc->data[2], sizeof(cf->data));
+		cf->can_dlc = get_can_dlc(desc->data[1] & ICAN3_CAN_DLC_MASK);
+		memcpy(cf->data, &desc->data[2], cf->can_dlc);
 	} else {
-		cf->can_dlc = desc->data[0] & ICAN3_CAN_DLC_MASK;
+		cf->can_dlc = get_can_dlc(desc->data[0] & ICAN3_CAN_DLC_MASK);
 		if (desc->data[0] & ICAN3_EFF_RTR)
 			cf->can_id |= CAN_RTR_FLAG;
 
@@ -829,7 +829,7 @@ static void ican3_to_can_frame(struct ican3_dev *mod,
 			cf->can_id |= desc->data[3] >> 5;  /* 2-0   */
 		}
 
-		memcpy(cf->data, &desc->data[6], sizeof(cf->data));
+		memcpy(cf->data, &desc->data[6], cf->can_dlc);
 	}
 }
 
@@ -861,7 +861,7 @@ static void can_frame_to_ican3(struct ican3_dev *mod,
 	}
 
 	/* copy the data bits into the descriptor */
-	memcpy(&desc->data[6], cf->data, sizeof(cf->data));
+	memcpy(&desc->data[6], cf->data, cf->can_dlc);
 }
 
 /*
-- 
1.7.10

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