On Fri, Jun 17, 2016 at 07:24:46PM -0700, Yinghai Lu wrote:
> In 8c05cd08a7 ("PCI: fix offset check for sysfs mmapped files"), try
> to check exposed value with resource start/end in proc mmap path.
>
> | start = vma->vm_pgoff;
> | size = ((pci_resource_len(pdev, resno) - 1) >> PAGE_SHIFT) + 1;
> | pci_start = (mmap_api == PCI_MMAP_PROCFS) ?
> | pci_resource_start(pdev, resno) >> PAGE_SHIFT : 0;
> | if (start >= pci_start && start < pci_start + size &&
> | start + nr <= pci_start + size)
>
> That breaks sparc that exposed value is BAR value, and need to be offseted
> to resource address.
I asked this same question of the v12 patch, but I don't think you
answered it:
I'm not quite sure what you're saying here. Are you saying that sparc
is currently broken, and this patch fixes it? If so, what exactly is
broken? Can you give a small example of an mmap that is currently
broken?
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