From: Yinghai Lu <yinghai@kernel.org>
Date: Mon, 24 Sep 2012 20:51:23 +0000 (-0600)
Subject: PCI/ACPI: Use DEVICE_ACPI_HANDLE rather than searching acpi_pci_roots
X-Git-Tag: v3.7-rc1~177^2~2^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=059e4ba292c69cb400cda92fbd37f25d4eec564b;p=profile%2Fivi%2Fkernel-x86-ivi.git

PCI/ACPI: Use DEVICE_ACPI_HANDLE rather than searching acpi_pci_roots

When we bind a device to an ACPI handle, the handle is stored in
dev->archdata.acpi_handle.  For such devices, there's no need to
search the acpi_pci_roots list with acpi_get_pci_rootbridge_handle();
we can just use DEVICE_ACPI_HANDLE(dev) directly.

[bhelgaas: changelog, reorder "if" to avoid negation]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Len Brown <lenb@kernel.org>
Cc: linux-acpi@vger.kernel.org
---

diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 248fba2..9a22b5e 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -22,19 +22,24 @@ extern phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle);
 static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
 {
 	struct pci_bus *pbus = pdev->bus;
+
 	/* Find a PCI root bus */
 	while (!pci_is_root_bus(pbus))
 		pbus = pbus->parent;
-	return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus),
-					      pbus->number);
+
+	return DEVICE_ACPI_HANDLE(pbus->bridge);
 }
 
 static inline acpi_handle acpi_pci_get_bridge_handle(struct pci_bus *pbus)
 {
-	if (!pci_is_root_bus(pbus))
-		return DEVICE_ACPI_HANDLE(&(pbus->self->dev));
-	return acpi_get_pci_rootbridge_handle(pci_domain_nr(pbus),
-					      pbus->number);
+	struct device *dev;
+
+	if (pci_is_root_bus(pbus))
+		dev = pbus->bridge;
+	else
+		dev = &pbus->self->dev;
+
+	return DEVICE_ACPI_HANDLE(dev);
 }
 #endif