linux-kernel - [55/90] NET: smc91x: Fix irq flags

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Date:	Wed, 16 Dec 2009 17:15:06 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Russell King <rmk+kernel@....linux.org.uk>,
	Eric Miao <eric.y.miao@...il.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [55/90] NET: smc91x: Fix irq flags

2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------


From: Russell King - ARM Linux <linux@....linux.org.uk>

[ Upstream commit d5ccd67bb77ced5249067d05171992a7d5020393 ]

smc91x.h defines SMC_IRQ_FLAGS to be -1 when it wants the interrupt
flags to be taken from the resource structure.  However, d280ead
changed this to checking for non-zero resource flags.

Unfortunately, this means that on some platforms, we end up passing
'-1' to request_irq rather than the desired result.  Combine the two
conditions into one so that the IRQ flags are taken from the resource
if either SMC_IRQ_FLAGS is -1 or the resource flags specify an
interrupt trigger.

This restores network on at least the Versatile platform.

Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
Acked-by: Eric Miao <eric.y.miao@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/net/smc91x.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/smc91x.c
+++ b/drivers/net/smc91x.c
@@ -2283,7 +2283,7 @@ static int __devinit smc_drv_probe(struc
 
 	ndev->irq = ires->start;
 
-	if (ires->flags & IRQF_TRIGGER_MASK)
+	if (irq_flags == -1 || ires->flags & IRQF_TRIGGER_MASK)
 		irq_flags = ires->flags & IRQF_TRIGGER_MASK;
 
 	ret = smc_request_attrib(pdev, ndev);


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