From 709edecd4eaaa210ea9296c6d8ec5e9cedf1abe3 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 2 Dec 2012 08:36:22 -0500
Subject: [PATCH] mfd: sta2x11: Fix potential NULL pointer dereference in
__sta2x11_mfd_mask()
The dereference to 'mfd' should be moved below the NULL test.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---
drivers/mfd/sta2x11-mfd.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mfd/sta2x11-mfd.c b/drivers/mfd/sta2x11-mfd.c
index 6fb0938a9665..009b4b7721eb 100644
--- a/drivers/mfd/sta2x11-mfd.c
+++ b/drivers/mfd/sta2x11-mfd.c
@@ -116,12 +116,14 @@ u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
u32 r;
unsigned long flags;
- void __iomem *regs = mfd->regs[index];
+ void __iomem *regs;
if (!mfd) {
dev_warn(&pdev->dev, ": can't access sctl regs\n");
return 0;
}
+
+ regs = mfd->regs[index];
if (!regs) {
dev_warn(&pdev->dev, ": system ctl not initialized\n");
return 0;
--
2.30.9