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[11/14] bna: MBOX IRQ Flag Check after Locking

Message ID 1313529591-3718-12-git-send-email-rmody@brocade.com
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Rasesh Mody Aug. 16, 2011, 9:19 p.m. UTC 
Change details:
 - Check the BNAD_RF_MBOX_IRQ_DISABLED flag after acquiring the bna_lock.

Signed-off-by: Gurunatha Karaje <gkaraje@brocade.com>
Signed-off-by: Rasesh Mody <rmody@brocade.com>
---
 drivers/net/ethernet/brocade/bna/bnad.c |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)
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Patch

diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c
index 76bfa19..5d431de 100644
--- a/drivers/net/ethernet/brocade/bna/bnad.c
+++ b/drivers/net/ethernet/brocade/bna/bnad.c
@@ -602,10 +602,11 @@  bnad_msix_mbox_handler(int irq, void *data)
 	unsigned long flags;
 	struct bnad *bnad = (struct bnad *)data;
 
-	if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags)))
-		return IRQ_HANDLED;
-
 	spin_lock_irqsave(&bnad->bna_lock, flags);
+	if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags))) {
+		spin_unlock_irqrestore(&bnad->bna_lock, flags);
+		return IRQ_HANDLED;
+	}
 
 	bna_intr_status_get(&bnad->bna, intr_status);
 
@@ -628,15 +629,18 @@  bnad_isr(int irq, void *data)
 	struct bnad_rx_ctrl *rx_ctrl;
 	struct bna_tcb *tcb = NULL;
 
-	if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags)))
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	if (unlikely(test_bit(BNAD_RF_MBOX_IRQ_DISABLED, &bnad->run_flags))) {
+		spin_unlock_irqrestore(&bnad->bna_lock, flags);
 		return IRQ_NONE;
+	}
 
 	bna_intr_status_get(&bnad->bna, intr_status);
 
-	if (unlikely(!intr_status))
+	if (unlikely(!intr_status)) {
+		spin_unlock_irqrestore(&bnad->bna_lock, flags);
 		return IRQ_NONE;
-
-	spin_lock_irqsave(&bnad->bna_lock, flags);
+	}
 
 	if (BNA_IS_MBOX_ERR_INTR(&bnad->bna, intr_status))
 		bna_mbox_handler(&bnad->bna, intr_status);