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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6
drivers/net/can/ti_hecc.c
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@@ -74,10 +74,6 @@ MODULE_VERSION(HECC_MODULE_VERSION);
#define HECC_MB_TX_SHIFT 2 /* as per table above */
#define HECC_MAX_TX_MBOX BIT(HECC_MB_TX_SHIFT)
#if (HECC_MAX_TX_MBOX > CAN_ECHO_SKB_MAX)
#error "HECC: MAX TX mailboxes should be equal or less than CAN_ECHO_SKB_MAX"
#endif
#define HECC_TX_PRIO_SHIFT (HECC_MB_TX_SHIFT)
#define HECC_TX_PRIO_MASK (MAX_TX_PRIO << HECC_MB_TX_SHIFT)
#define HECC_TX_MB_MASK (HECC_MAX_TX_MBOX - 1)
@@ -902,7 +898,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
goto probe_exit_free_region;
}
ndev = alloc_candev(sizeof(struct ti_hecc_priv));
ndev = alloc_candev(sizeof(struct ti_hecc_priv), HECC_MAX_TX_MBOX);
if (!ndev) {
dev_err(&pdev->dev, "alloc_candev failed\n");
err = -ENOMEM;