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>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/lib/devres.c b/lib/devres.c
index b1d336c..edc27a5 100644
--- a/lib/devres.c
+++ b/lib/devres.c
@@ -298,6 +298,31 @@
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
