linux-kernel - [PATCH] vme: vme_ca91cx42.c: fix to pass correct device identity to free

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Message-ID: <CAPgLHd-Lj7MjTYGA6TNK2JtScORtd5NvAo3WZuM425sRJj8=tw@mail.gmail.com>
Date:	Mon, 26 Aug 2013 12:04:05 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	martyn.welch@...com, manohar.vanga@...il.com,
	gregkh@...uxfoundation.org
Cc:	yongjun_wei@...ndmicro.com.cn, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] vme: vme_ca91cx42.c: fix to pass correct device identity to free_irq()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

free_irq() expects the same device identity that was passed to
corresponding request_irq(), otherwise the IRQ is not freed.

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/vme/bridges/vme_ca91cx42.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/vme/bridges/vme_ca91cx42.c b/drivers/vme/bridges/vme_ca91cx42.c
index 64bfea3..f24e234 100644
--- a/drivers/vme/bridges/vme_ca91cx42.c
+++ b/drivers/vme/bridges/vme_ca91cx42.c
@@ -243,6 +243,8 @@ static int ca91cx42_irq_init(struct vme_bridge *ca91cx42_bridge)
 static void ca91cx42_irq_exit(struct ca91cx42_driver *bridge,
 	struct pci_dev *pdev)
 {
+	struct vme_bridge *ca91cx42_bridge;
+
 	/* Disable interrupts from PCI to VME */
 	iowrite32(0, bridge->base + VINT_EN);
 
@@ -251,7 +253,9 @@ static void ca91cx42_irq_exit(struct ca91cx42_driver *bridge,
 	/* Clear Any Pending PCI Interrupts */
 	iowrite32(0x00FFFFFF, bridge->base + LINT_STAT);
 
-	free_irq(pdev->irq, pdev);
+	ca91cx42_bridge = container_of((void *)bridge, struct vme_bridge,
+				       driver_priv);
+	free_irq(pdev->irq, ca91cx42_bridge);
 }
 
 static int ca91cx42_iack_received(struct ca91cx42_driver *bridge, int level)

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