diff options
| -rw-r--r-- | drivers/net/ieee802154/at86rf230.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c index 1d438bc54189..503fabddd431 100644 --- a/drivers/net/ieee802154/at86rf230.c +++ b/drivers/net/ieee802154/at86rf230.c @@ -52,7 +52,13 @@ struct at86rf2xx_chip_data { int (*get_desense_steps)(struct at86rf230_local *, s32); }; -#define AT86RF2XX_MAX_BUF (127 + 3) +#define AT86RF2XX_MAX_BUF (127 + 3) +/* tx retries to access the TX_ON state + * if it's above then force change will be started. + * + * We assume the max_frame_retries (7) value of 802.15.4 here. + */ +#define AT86RF2XX_MAX_TX_RETRIES 7 struct at86rf230_state_change { struct at86rf230_local *lp; @@ -85,6 +91,7 @@ struct at86rf230_local { bool is_tx; /* spinlock for is_tx protection */ spinlock_t lock; + u8 tx_retry; struct sk_buff *tx_skb; struct at86rf230_state_change tx; }; @@ -512,10 +519,20 @@ at86rf230_async_state_assert(void *context) * in STATE_BUSY_RX_AACK, we run a force state change * to STATE_TX_ON. This is a timeout handling, if the * transceiver stucks in STATE_BUSY_RX_AACK. + * + * Additional we do several retries to try to get into + * TX_ON state without forcing. If the retries are + * higher or equal than AT86RF2XX_MAX_TX_RETRIES we + * will do a force change. */ if (ctx->to_state == STATE_TX_ON) { - at86rf230_async_state_change(lp, ctx, - STATE_FORCE_TX_ON, + u8 state = STATE_TX_ON; + + if (lp->tx_retry >= AT86RF2XX_MAX_TX_RETRIES) + state = STATE_FORCE_TX_ON; + lp->tx_retry++; + + at86rf230_async_state_change(lp, ctx, state, ctx->complete, ctx->irq_enable); return; @@ -963,6 +980,7 @@ at86rf230_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) if (lp->tx_aret) tx_complete = at86rf230_xmit_tx_on; + lp->tx_retry = 0; at86rf230_async_state_change(lp, ctx, STATE_TX_ON, tx_complete, false); return 0; |