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>
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@ -116,12 +116,14 @@ u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val,
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struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
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struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev);
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u32 r;
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u32 r;
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unsigned long flags;
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unsigned long flags;
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void __iomem *regs = mfd->regs[index];
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void __iomem *regs;
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if (!mfd) {
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if (!mfd) {
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dev_warn(&pdev->dev, ": can't access sctl regs\n");
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dev_warn(&pdev->dev, ": can't access sctl regs\n");
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return 0;
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return 0;
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}
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}
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regs = mfd->regs[index];
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if (!regs) {
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if (!regs) {
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dev_warn(&pdev->dev, ": system ctl not initialized\n");
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dev_warn(&pdev->dev, ": system ctl not initialized\n");
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return 0;
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return 0;
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