Hi Simon,
On Wed, Jun 21, 2023 at 04:19:06PM +0200, Simon Horman wrote:
> On Wed, Jun 21, 2023 at 11:23:39AM +0200, Markus Schneider-Pargmann wrote:
> > Combine header and data before writing to the transmit fifo to reduce
> > the overhead for peripheral chips.
> >
> > Signed-off-by: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>
> > ---
> > drivers/net/can/m_can/m_can.c | 34 +++++++++++++++++++++-------------
> > 1 file changed, 21 insertions(+), 13 deletions(-)
> >
> > diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
> > index a5003435802b..5251073987ee 100644
> > --- a/drivers/net/can/m_can/m_can.c
> > +++ b/drivers/net/can/m_can/m_can.c
> > @@ -317,6 +317,12 @@ struct id_and_dlc {
> > u32 dlc;
> > };
> >
> > +struct m_can_fifo_element {
> > + u32 id;
> > + u32 dlc;
> > + u8 data[CANFD_MAX_DLEN];
> > +};
> > +
> > static inline u32 m_can_read(struct m_can_classdev *cdev, enum m_can_reg reg)
> > {
> > return cdev->ops->read_reg(cdev, reg);
> > @@ -1622,6 +1628,8 @@ static int m_can_next_echo_skb_occupied(struct net_device *dev, int putidx)
> > static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
> > {
> > struct canfd_frame *cf = (struct canfd_frame *)cdev->tx_skb->data;
> > + u8 len_padded = DIV_ROUND_UP(cf->len, 4);
> > + struct m_can_fifo_element fifo_element;
> > struct net_device *dev = cdev->net;
> > struct sk_buff *skb = cdev->tx_skb;
> > struct id_and_dlc fifo_header;
>
> Hi Markus,
>
> GCC 12.3.0 complains that fifo_header is not (no longer) used.
>
> drivers/net/can/m_can/m_can.c:1635:20: warning: unused variable 'fifo_header' [-Wunused-variable]
> struct id_and_dlc fifo_header;
Yes, I moved everything to fifo_element on purpose and then forgot to
remove fifo_header. Removing it now.
Thanks,
Markus
>
> --
> pw-bot: changes-requested
>
