As suggested by Vincent I spend a union plus a struct ev_can_err_ext
for easier decoding of an ESD_EV_CAN_ERROR_EXT event message (which
simply is a rx_msg with some dedicated data).
Signed-off-by: Frank Jungclaus <frank.jungclaus@xxxxxx>
---
drivers/net/can/usb/esd_usb.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/drivers/net/can/usb/esd_usb.c b/drivers/net/can/usb/esd_usb.c
index 09649a45d6ff..2b149590720c 100644
--- a/drivers/net/can/usb/esd_usb.c
+++ b/drivers/net/can/usb/esd_usb.c
@@ -126,7 +126,15 @@ struct rx_msg {
u8 dlc;
__le32 ts;
__le32 id; /* upper 3 bits contain flags */
- u8 data[8];
+ union {
+ u8 data[8];
+ struct {
+ u8 status; /* CAN Controller Status */
+ u8 ecc; /* Error Capture Register */
+ u8 rec; /* RX Error Counter */
+ u8 tec; /* TX Error Counter */
+ } ev_can_err_ext; /* For ESD_EV_CAN_ERROR_EXT */
+ };
};
struct tx_msg {
@@ -134,7 +142,7 @@ struct tx_msg {
u8 cmd;
u8 net;
u8 dlc;
- u32 hnd; /* opaque handle, not used by device */
+ u32 hnd; /* opaque handle, not used by device */
__le32 id; /* upper 3 bits contain flags */
u8 data[8];
};
@@ -228,11 +236,11 @@ static void esd_usb_rx_event(struct esd_usb_net_priv *priv,
u32 id = le32_to_cpu(msg->msg.rx.id) & ESD_IDMASK;
if (id == ESD_EV_CAN_ERROR_EXT) {
- u8 state = msg->msg.rx.data[0];
- u8 ecc = msg->msg.rx.data[1];
+ u8 state = msg->msg.rx.ev_can_err_ext.status;
+ u8 ecc = msg->msg.rx.ev_can_err_ext.ecc;
- priv->bec.rxerr = msg->msg.rx.data[2];
- priv->bec.txerr = msg->msg.rx.data[3];
+ priv->bec.rxerr = msg->msg.rx.ev_can_err_ext.rec;
+ priv->bec.txerr = msg->msg.rx.ev_can_err_ext.tec;
netdev_dbg(priv->netdev,
"CAN_ERR_EV_EXT: dlc=%#02x state=%02x ecc=%02x rec=%02x tec=%02x\n",
--
2.25.1
