can: mcp251x: fix reception of standard RTR frames
This patch sets the missing CAN_RTR_FLAG if a standard RTR frame is
received.
(For extended frames the CAN_RTR_FLAG was already set correctly.)
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c
index 6aadc3e..7ab534a 100644
--- a/drivers/net/can/mcp251x.c
+++ b/drivers/net/can/mcp251x.c
@@ -169,6 +169,7 @@
# define RXBSIDH_SHIFT 3
#define RXBSIDL(n) (((n) * 0x10) + 0x60 + RXBSIDL_OFF)
# define RXBSIDL_IDE 0x08
+# define RXBSIDL_SRR 0x10
# define RXBSIDL_EID 3
# define RXBSIDL_SHIFT 5
#define RXBEID8(n) (((n) * 0x10) + 0x60 + RXBEID8_OFF)
@@ -475,6 +476,8 @@
frame->can_id =
(buf[RXBSIDH_OFF] << RXBSIDH_SHIFT) |
(buf[RXBSIDL_OFF] >> RXBSIDL_SHIFT);
+ if (buf[RXBSIDL_OFF] & RXBSIDL_SRR)
+ frame->can_id |= CAN_RTR_FLAG;
}
/* Data length */
frame->can_dlc = get_can_dlc(buf[RXBDLC_OFF] & RXBDLC_LEN_MASK);