xiaomi-sm8450/android_kernel_xiaomi_sm8450
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can: make the number of echo skb's configurable

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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>
This commit is contained in:
Wolfgang Grandegger
2009-10-08 22:17:11 +00:00
committed by David S. Miller
parent 61321bbd62
commit a6e4bc5304
7 changed files with 42 additions and 23 deletions
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2
drivers/net/can/sja1000/sja1000.h
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@@ -50,6 +50,8 @@
#include <linux/can/dev.h>
#include <linux/can/platform/sja1000.h>
#define SJA1000_ECHO_SKB_MAX 1 /* the SJA1000 has one TX buffer object */
#define SJA1000_MAX_IRQ 20 /* max. number of interrupts handled in ISR */
/* SJA1000 registers - manual section 6.4 (Pelican Mode) */