netdev - [PATCH net-next 2/6] drivers/ieee802154/at86rf230: rework irq handler

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Date:	Mon,  9 Jul 2012 14:22:27 +0400
From:	Alexander Smirnov <alex.bluesman.smirnov@...il.com>
To:	davem@...emloft.net, eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org,
	Alexander Smirnov <alex.bluesman.smirnov@...il.com>
Subject: [PATCH net-next 2/6] drivers/ieee802154/at86rf230: rework irq handler

Fix LOCKDEP bug message for the irq handler spinlock.
Make the irq processing code more explicit and stable.

Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@...il.com>
---
 drivers/ieee802154/at86rf230.c |   14 ++++++--------
 1 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/ieee802154/at86rf230.c b/drivers/ieee802154/at86rf230.c
index 902e38b..17b8320 100644
--- a/drivers/ieee802154/at86rf230.c
+++ b/drivers/ieee802154/at86rf230.c
@@ -652,22 +652,20 @@ static void at86rf230_irqwork(struct work_struct *work)
 		}
 	}
 
-	if (lp->irq_disabled) {
-		lp->irq_disabled = 0;
-		enable_irq(lp->spi->irq);
-	}
+	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);
-- 
1.7.2.3

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