can: make the number of echo skb's configurable
authorWolfgang Grandegger <wg@grandegger.com>
Thu, 8 Oct 2009 22:17:11 +0000 (22:17 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 13 Oct 2009 10:44:04 +0000 (03:44 -0700)
commita6e4bc5304033e434fabccabb230b8e9ff55d76f
treea1ddf8a6648a5f60e8196c34ad20f9e107f40e8e
parent61321bbd6235ca9a40ba3bc249e8906cc66233c3
can: make the number of echo skb's configurable

This patch allows the CAN controller driver to define the number of echo
skb's used for the local loopback (echo), as suggested by Kurt Van
Dijck, with the function:

  struct net_device *alloc_candev(int sizeof_priv,
                                  unsigned int echo_skb_max);

The CAN drivers have been adapted accordingly. For the ems_usb driver,
as suggested by Sebastian Haas, the number of echo skb's has been
increased to 10, which improves the transmission performance a lot.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/can/at91_can.c
drivers/net/can/dev.c
drivers/net/can/sja1000/sja1000.c
drivers/net/can/sja1000/sja1000.h
drivers/net/can/ti_hecc.c
drivers/net/can/usb/ems_usb.c
include/linux/can/dev.h