On Tue, May 20 2014, Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx> wrote:
> PCI accessors from user space pci_user_{read,write}_config_*()
> return negative error number, which was introduced by commit
> 34e32072 ("PCI: handle positive error codes"). That patch coverts
> all positive error numbers from platform specific PCI config
> accessors to -EINVAL. The upper layer calling to those PCI config
> accessors hardly know the specific cause from the return value
> when hitting failures.
>
> The patch fixes the issue by doing the conversion (from positive
> to negative) using existing function pcibios_err_to_errno().
>
> v2: pcibios_err_to_errno() translates unrecognized value to -ERANGE.
>
> Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
Acked-by: Greg Thelen <gthelen@xxxxxxxxxx>
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