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video: imsttfb: fix potential NULL pointer dereferences
In case ioremap fails, the fix releases resources and returns -ENOMEM to avoid NULL pointer dereferences. Signed-off-by: Kangjie Lu <kjlu@umn.edu> Cc: Aditya Pakki <pakki001@umn.edu> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Rob Herring <robh@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [b.zolnierkie: minor patch summary fixup] Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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@ -1515,6 +1515,11 @@ static int imsttfb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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info->fix.smem_start = addr;
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info->screen_base = (__u8 *)ioremap(addr, par->ramdac == IBM ?
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0x400000 : 0x800000);
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if (!info->screen_base) {
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release_mem_region(addr, size);
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framebuffer_release(info);
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return -ENOMEM;
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}
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info->fix.mmio_start = addr + 0x800000;
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par->dc_regs = ioremap(addr + 0x800000, 0x1000);
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par->cmap_regs_phys = addr + 0x840000;
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