diff options
Diffstat (limited to 'drivers/ieee802154')
| -rw-r--r-- | drivers/ieee802154/at86rf230.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/drivers/ieee802154/at86rf230.c b/drivers/ieee802154/at86rf230.c index 902e38bb382f..5d309408395d 100644 --- a/drivers/ieee802154/at86rf230.c +++ b/drivers/ieee802154/at86rf230.c @@ -543,6 +543,13 @@ at86rf230_xmit(struct ieee802154_dev *dev, struct sk_buff *skb) int rc; unsigned long flags; + spin_lock(&lp->lock); + if (lp->irq_disabled) { + spin_unlock(&lp->lock); + return -EBUSY; + } + spin_unlock(&lp->lock); + might_sleep(); rc = at86rf230_state(dev, STATE_FORCE_TX_ON); @@ -592,12 +599,8 @@ static int at86rf230_rx(struct at86rf230_local *lp) if (!skb) return -ENOMEM; - if (at86rf230_write_subreg(lp, SR_RX_PDT_DIS, 1) || - at86rf230_read_fbuf(lp, skb_put(skb, len), &len, &lqi) || - at86rf230_write_subreg(lp, SR_RX_SAFE_MODE, 1) || - at86rf230_write_subreg(lp, SR_RX_PDT_DIS, 0)) { + if (at86rf230_read_fbuf(lp, skb_put(skb, len), &len, &lqi)) goto err; - } if (len < 2) goto err; @@ -633,7 +636,6 @@ static void at86rf230_irqwork(struct work_struct *work) int rc; unsigned long flags; - spin_lock_irqsave(&lp->lock, flags); rc = at86rf230_read_subreg(lp, RG_IRQ_STATUS, 0xff, 0, &val); status |= val; @@ -643,31 +645,33 @@ static void at86rf230_irqwork(struct work_struct *work) status &= ~IRQ_TRX_UR; /* FIXME: possibly handle ???*/ if (status & IRQ_TRX_END) { + spin_lock_irqsave(&lp->lock, flags); status &= ~IRQ_TRX_END; if (lp->is_tx) { lp->is_tx = 0; + spin_unlock_irqrestore(&lp->lock, flags); complete(&lp->tx_complete); } else { + spin_unlock_irqrestore(&lp->lock, flags); at86rf230_rx(lp); } } - if (lp->irq_disabled) { - lp->irq_disabled = 0; - enable_irq(lp->spi->irq); - } + spin_lock_irqsave(&lp->lock, flags); + lp->irq_disabled = 0; spin_unlock_irqrestore(&lp->lock, flags); + + enable_irq(lp->spi->irq); } static irqreturn_t at86rf230_isr(int irq, void *data) { struct at86rf230_local *lp = data; + disable_irq_nosync(irq); + spin_lock(&lp->lock); - if (!lp->irq_disabled) { - disable_irq_nosync(irq); - lp->irq_disabled = 1; - } + lp->irq_disabled = 1; spin_unlock(&lp->lock); schedule_work(&lp->irqwork); |