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| author | Wei Yongjun <yongjun_wei@trendmicro.com.cn> | 2012-12-02 08:36:22 -0500 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-12-03 00:46:49 +0100 |
| commit | 709edecd4eaaa210ea9296c6d8ec5e9cedf1abe3 (patch) | |
| tree | b2f5323d5bd682ef8040db4e6d1642da5dc2767e /drivers/mfd/sta2x11-mfd.c | |
| parent | 3748f193552ba21a8239c56eb616d946c47607e7 (diff) | |
| download | linux-709edecd4eaaa210ea9296c6d8ec5e9cedf1abe3.tar.gz linux-709edecd4eaaa210ea9296c6d8ec5e9cedf1abe3.tar.bz2 linux-709edecd4eaaa210ea9296c6d8ec5e9cedf1abe3.zip | |
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>
Diffstat (limited to 'drivers/mfd/sta2x11-mfd.c')
| -rw-r--r-- | drivers/mfd/sta2x11-mfd.c | 4 |
1 files changed, 3 insertions, 1 deletions
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; |