On Sat. 9 Jul. 2022 at 03:14, Frank Jungclaus <frank.jungclaus@xxxxxx> wrote: > As suggested by Vincent I spend a union plus a struct ev_can_err_ext The canonical way to declare that something was suggested by someone else is to use the Suggested-by tag. Also, this particular change was suggested by Marc, not by me ;) https://lore.kernel.org/linux-can/20220621071152.ggyhrr5sbzvwpkpx@xxxxxxxxxxxxxx/ > for easier decoding of an ESD_EV_CAN_ERROR_EXT event message (which > simply is a rx_msg with some dedicated data). Suggested-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx> > 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", Yours sincerely, Vincent Mailhol
