can: mcp251x: fix generation of error frames

The function "mcp251x_error_skb" is used to generate error frames.
They are identified by the "CAN_ERR_FLAG" in can_id. The function
overwrites the can_id so that the frames show up as normal frames instead
of error frames.

This patch fixes the problem by or'ing the can_id instead of overwriting it.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Tested-by: Jargalan Nermunkh <jargalan.nermunkh@criticallink.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c
index 59f40bc..6aadc3e 100644 (file)
--- a/drivers/net/can/mcp251x.c
+++ b/drivers/net/can/mcp251x.c
@@ -705,7 +705,7 @@ static void mcp251x_error_skb(struct net_device *net, int can_id, int data1)
 
        skb = alloc_can_err_skb(net, &frame);
        if (skb) {
-               frame->can_id = can_id;
+               frame->can_id |= can_id;
                frame->data[1] = data1;
                netif_rx_ni(skb);
        } else {