Implement pcim_iounmap_regions() - the opposite of
pcim_iomap_regions().

Signed-off-by: Tejun heo <[EMAIL PROTECTED]>
---
This one is used by libata's new init model and generally useful for
driver midlayers.  Please push it through libata-dev#upstream.

Thanks.

 include/linux/pci.h |    1 +
 lib/devres.c        |   26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2c4b684..8d3b221 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -844,6 +844,7 @@ void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, 
unsigned long maxlen);
 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
 void __iomem * const * pcim_iomap_table(struct pci_dev *pdev);
 int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
+void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
 
 extern int pci_pci_problems;
 #define PCIPCI_FAIL            1       /* No PCI PCI DMA */
diff --git a/lib/devres.c b/lib/devres.c
index eb38849..b1d336c 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -296,5 +296,31 @@ int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, 
const char *name)
        return rc;
 }
 EXPORT_SYMBOL(pcim_iomap_regions);
+
+/**
+ * pcim_iounmap_regions - Unmap and release PCI BARs
+ * @pdev: PCI device to map IO resources for
+ * @mask: Mask of BARs to unmap and release
+ *
+ * Unamp and release regions specified by @mask.
+ */
+void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask)
+{
+       void __iomem * const *iomap;
+       int i;
+
+       iomap = pcim_iomap_table(pdev);
+       if (!iomap)
+               return;
+
+       for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+               if (!(mask & (1 << i)))
+                       continue;
+
+               pcim_iounmap(pdev, iomap[i]);
+               pci_release_region(pdev, i);
+       }
+}
+EXPORT_SYMBOL(pcim_iounmap_regions);
 #endif
 #endif
-- 
1.5.0.1

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