linux-kernel - [PATCH -v3 17/47] x86, PCI: Separate pcibios_allocate_dev

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Message-Id: <1332135996-13860-18-git-send-email-yinghai@kernel.org>
Date:	Sun, 18 Mar 2012 22:46:06 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>, x86 <x86@...nel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH -v3 17/47] x86, PCI: Separate pcibios_allocate_dev_resources()

Thus pcibios_allocate_resources() could more simple and clean

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/pci/i386.c |   42 +++++++++++++++++++++++-------------------
 1 files changed, 23 insertions(+), 19 deletions(-)

diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index c06f60f..bb84ff0 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -232,9 +232,8 @@ struct pci_check_idx_range {
 	int end;
 };
 
-static void __init pcibios_allocate_resources(int pass)
+static void __init pcibios_allocate_dev_resources(struct pci_dev *dev, int pass)
 {
-	struct pci_dev *dev = NULL;
 	int idx, disabled, i;
 	u16 command;
 	struct resource *r;
@@ -246,14 +245,13 @@ static void __init pcibios_allocate_resources(int pass)
 #endif
 	};
 
-	for_each_pci_dev(dev) {
-		pci_read_config_word(dev, PCI_COMMAND, &command);
-		for (i = 0; i < ARRAY_SIZE(idx_range); i++)
+	pci_read_config_word(dev, PCI_COMMAND, &command);
+	for (i = 0; i < ARRAY_SIZE(idx_range); i++)
 		for (idx = idx_range[i].start; idx <= idx_range[i].end; idx++) {
 			r = &dev->resource[idx];
-			if (r->parent)		/* Already allocated */
+			if (r->parent)	/* Already allocated */
 				continue;
-			if (!r->start)		/* Address not assigned at all */
+			if (!r->start)	/* Address not assigned at all */
 				continue;
 			if (r->flags & IORESOURCE_IO)
 				disabled = !(command & PCI_COMMAND_IO);
@@ -272,23 +270,29 @@ static void __init pcibios_allocate_resources(int pass)
 				}
 			}
 		}
-		if (!pass) {
-			r = &dev->resource[PCI_ROM_RESOURCE];
-			if (r->flags & IORESOURCE_ROM_ENABLE) {
-				/* Turn the ROM off, leave the resource region,
-				 * but keep it unregistered. */
-				u32 reg;
-				dev_dbg(&dev->dev, "disabling ROM %pR\n", r);
-				r->flags &= ~IORESOURCE_ROM_ENABLE;
-				pci_read_config_dword(dev,
-						dev->rom_base_reg, &reg);
-				pci_write_config_dword(dev, dev->rom_base_reg,
+	if (!pass) {
+		r = &dev->resource[PCI_ROM_RESOURCE];
+		if (r->flags & IORESOURCE_ROM_ENABLE) {
+			/* Turn the ROM off, leave the resource region,
+			 * but keep it unregistered. */
+			u32 reg;
+			dev_dbg(&dev->dev, "disabling ROM %pR\n", r);
+			r->flags &= ~IORESOURCE_ROM_ENABLE;
+			pci_read_config_dword(dev, dev->rom_base_reg, &reg);
+			pci_write_config_dword(dev, dev->rom_base_reg,
 						reg & ~PCI_ROM_ADDRESS_ENABLE);
-			}
 		}
 	}
 }
 
+static void __init pcibios_allocate_resources(int pass)
+{
+	struct pci_dev *dev = NULL;
+
+	for_each_pci_dev(dev)
+		pcibios_allocate_dev_resources(dev, pass);
+}
+
 static int __init pcibios_assign_resources(void)
 {
 	struct pci_dev *dev = NULL;
-- 
1.7.7

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