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at86rf230: correct aret lifs and sifs handling 

This patch adds lifs/sifs handling only if max_frame_retries is above
zero. The at86rf2xx datasheets says nothing about phy lifs/sifs
handling. I asked the atmel support and they said lifs/sifs is done
by phy when max_frame_retries is above zero.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2014-10-07 10:38:27 +02:00 committed by Marcel Holtmann
parent d06c21990f
commit 850f43acb1
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ieee802154/at86rf230.c
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@ -89,6 +89,7 @@ struct at86rf230_local {
struct at86rf230_state_change irq;
bool tx_aret;
s8 max_frame_retries;
bool is_tx;
/* spinlock for is_tx protection */
spinlock_t lock;
@ -1001,6 +1002,9 @@ at86rf230_xmit(struct ieee802154_dev *dev, struct sk_buff *skb)
return -ETIMEDOUT;
}
if (lp->max_frame_retries > 0)
return 0;
/* Interfame spacing time, which is phy depend.
* TODO
* Move this handling in MAC 802.15.4 layer.
@ -1230,6 +1234,7 @@ at86rf230_set_frame_retries(struct ieee802154_dev *dev, s8 retries)
return -EINVAL;
lp->tx_aret = retries >= 0;
lp->max_frame_retries = retries;
if (retries >= 0)
rc = at86rf230_write_subreg(lp, SR_MAX_FRAME_RETRIES, retries);