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    Subject[PATCH] devres: implement pcim_iomap_regions_request_all()
    Some drivers need to reserve all PCI BARs to prevent other drivers
    misusing unoccupied BARs. pcim_iomap_regions_request_all() requests
    all BARs and iomap specified BARs.

    Signed-off-by: Tejun Heo <htejun@gmail.com>
    Cc: Greg Kroah-Hartman <gregkh@suse.de>
    Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
    Cc: Jeff Garzik <jeff@garzik.org>
    ---
    After acked, it's probably best to push this through libata-dev as
    that's the only user for now.

    Thanks.

    lib/devres.c | 25 +++++++++++++++++++++++++
    1 file changed, 25 insertions(+)

    Index: work/lib/devres.c
    ===================================================================
    --- work.orig/lib/devres.c
    +++ work/lib/devres.c
    @@ -298,6 +298,31 @@ int pcim_iomap_regions(struct pci_dev *p
    EXPORT_SYMBOL(pcim_iomap_regions);

    /**
    + * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
    + * @pdev: PCI device to map IO resources for
    + * @mask: Mask of BARs to iomap
    + * @name: Name used when requesting regions
    + *
    + * Request all PCI BARs and iomap regions specified by @mask.
    + */
    +int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
    + const char *name)
    +{
    + int request_mask = ((1 << 6) - 1) & ~mask;
    + int rc;
    +
    + rc = pci_request_selected_regions(pdev, request_mask, name);
    + if (rc)
    + return rc;
    +
    + rc = pcim_iomap_regions(pdev, mask, name);
    + if (rc)
    + pci_release_selected_regions(pdev, request_mask);
    + return rc;
    +}
    +EXPORT_SYMBOL(pcim_iomap_regions_request_all);
    +
    +/**
    * pcim_iounmap_regions - Unmap and release PCI BARs
    * @pdev: PCI device to map IO resources for
    * @mask: Mask of BARs to unmap and release

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