Implement pcim_iounmap_regions() - the opposite of
pcim_iomap_regions().
Signed-off-by: Tejun heo <htejun@xxxxxxxxx>
---
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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