linux-kernel - [PATCH] forcedeth: spin_unlock

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Message-Id: <1342821274-20623-1-git-send-email-yefremov.denis@gmail.com>
Date:	Sat, 21 Jul 2012 01:54:34 +0400
From:	Denis Efremov <yefremov.denis@...il.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	Denis Efremov <yefremov.denis@...il.com>,
	David Decotigny <david.decotigny@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jiri Pirko <jpirko@...hat.com>,
	Ian Campbell <ian.campbell@...rix.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] forcedeth: spin_unlock_irq in interrupt handler fix

The replacement of spin_lock_irq/spin_unlock_irq pair in interrupt
handler by spin_lock_irqsave/spin_lock_irqrestore pair.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Denis Efremov <yefremov.denis@...il.com>
---
 drivers/net/ethernet/nvidia/forcedeth.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/nvidia/forcedeth.c b/drivers/net/ethernet/nvidia/forcedeth.c
index 928913c..7e68c00 100644
--- a/drivers/net/ethernet/nvidia/forcedeth.c
+++ b/drivers/net/ethernet/nvidia/forcedeth.c
@@ -3776,7 +3776,7 @@ static irqreturn_t nv_nic_irq_other(int foo, void *data)
 			np->link_timeout = jiffies + LINK_TIMEOUT;
 		}
 		if (events & NVREG_IRQ_RECOVER_ERROR) {
-			spin_lock_irq(&np->lock);
+			spin_lock_irqsave(&np->lock, flags);
 			/* disable interrupts on the nic */
 			writel(NVREG_IRQ_OTHER, base + NvRegIrqMask);
 			pci_push(base);
@@ -3786,7 +3786,7 @@ static irqreturn_t nv_nic_irq_other(int foo, void *data)
 				np->recover_error = 1;
 				mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
 			}
-			spin_unlock_irq(&np->lock);
+			spin_unlock_irqrestore(&np->lock, flags);
 			break;
 		}
 		if (unlikely(i > max_interrupt_work)) {
-- 
1.7.7

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