Messages in this thread | | | Date | Mon, 13 May 2013 23:55:48 -0400 | From | Alan Ott <> | Subject | Re: [Linux-zigbee-devel] [PATCH 2/2] mrf24j40: Keep the interrupt line enabled |
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On 5/9/13 11:19 AM, David Hauweele wrote: > Disabling the interrupt line could miss an IRQ and leave the line into a > low state hence locking the driver. >
Have you observed this? My understanding is that the interrupt won't be lost but instead delayed until enable_irq() is called.
I got this pattern from the other 802.15.4 drivers. Perhaps my understanding is wrong.
> Signed-off-by: David Hauweele <david@hauweele.net> > --- > drivers/net/ieee802154/mrf24j40.c | 7 +------ > 1 file changed, 1 insertion(+), 6 deletions(-) > > diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c > index 1e3ddf3..6ef32f7 100644 > --- a/drivers/net/ieee802154/mrf24j40.c > +++ b/drivers/net/ieee802154/mrf24j40.c > @@ -603,8 +603,6 @@ static irqreturn_t mrf24j40_isr(int irq, void *data) > { > struct mrf24j40 *devrec = data; > > - disable_irq_nosync(irq); > - > schedule_work(&devrec->irqwork); > > return IRQ_HANDLED; > @@ -619,7 +617,7 @@ static void mrf24j40_isrwork(struct work_struct *work) > /* Read the interrupt status */ > ret = read_short_reg(devrec, REG_INTSTAT, &intstat); > if (ret) > - goto out; > + return; > > /* Check for TX complete */ > if (intstat & 0x1) > @@ -628,9 +626,6 @@ static void mrf24j40_isrwork(struct work_struct *work) > /* Check for Rx */ > if (intstat & 0x8) > schedule_work(&devrec->rxwork); > - > -out: > - enable_irq(devrec->spi->irq); > } > > static void mrf24j40_rxwork(struct work_struct *work) >
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