linux-kernel - [PATCH 7/16 v6] PCI: cleanup pcibios_allocate

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Message-ID: <20081022084241.GG3773@yzhao12-linux.sh.intel.com>
Date:	Wed, 22 Oct 2008 16:42:41 +0800
From:	Yu Zhao <yu.zhao@...el.com>
To:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Cc:	"achiang@...com" <achiang@...com>,
	"grundler@...isc-linux.org" <grundler@...isc-linux.org>,
	"greg@...ah.com" <greg@...ah.com>, "mingo@...e.hu" <mingo@...e.hu>,
	"jbarnes@...tuousgeek.org" <jbarnes@...tuousgeek.org>,
	"matthew@....cx" <matthew@....cx>,
	"randy.dunlap@...cle.com" <randy.dunlap@...cle.com>,
	"rdreier@...co.com" <rdreier@...co.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>
Subject: [PATCH 7/16 v6] PCI: cleanup pcibios_allocate_resources()

This cleanup makes pcibios_allocate_resources() easier to read.

Cc: Alex Chiang <achiang@...com>
Cc: Grant Grundler <grundler@...isc-linux.org>
Cc: Greg KH <greg@...ah.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Jesse Barnes <jbarnes@...tuousgeek.org>
Cc: Matthew Wilcox <matthew@....cx>
Cc: Randy Dunlap <randy.dunlap@...cle.com>
Cc: Roland Dreier <rdreier@...co.com>
Signed-off-by: Yu Zhao <yu.zhao@...el.com>

---
 arch/x86/pci/i386.c |   28 ++++++++++++++--------------
 1 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c
index 844df0c..8729bde 100644
--- a/arch/x86/pci/i386.c
+++ b/arch/x86/pci/i386.c
@@ -147,7 +147,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
 static void __init pcibios_allocate_resources(int pass)
 {
 	struct pci_dev *dev = NULL;
-	int idx, disabled;
+	int idx, enabled;
 	u16 command;
 	struct resource *r, *pr;
 
@@ -160,22 +160,22 @@ static void __init pcibios_allocate_resources(int pass)
 			if (!r->start)		/* Address not assigned at all */
 				continue;
 			if (r->flags & IORESOURCE_IO)
-				disabled = !(command & PCI_COMMAND_IO);
+				enabled = command & PCI_COMMAND_IO;
 			else
-				disabled = !(command & PCI_COMMAND_MEMORY);
-			if (pass == disabled) {
-				dev_dbg(&dev->dev, "resource %#08llx-%#08llx (f=%lx, d=%d, p=%d)\n",
+				enabled = command & PCI_COMMAND_MEMORY;
+			if (pass == enabled)
+				continue;
+			dev_dbg(&dev->dev, "resource %#08llx-%#08llx (f=%lx, d=%d, p=%d)\n",
 					(unsigned long long) r->start,
 					(unsigned long long) r->end,
-					r->flags, disabled, pass);
-				pr = pci_find_parent_resource(dev, r);
-				if (!pr || request_resource(pr, r) < 0) {
-					dev_err(&dev->dev, "BAR %d: can't allocate resource\n", idx);
-					/* We'll assign a new address later */
-					r->end -= r->start;
-					r->start = 0;
-				}
-			}
+					r->flags, enabled, pass);
+			pr = pci_find_parent_resource(dev, r);
+			if (pr && !request_resource(pr, r))
+				continue;
+			dev_err(&dev->dev, "BAR %d: can't allocate resource\n", idx);
+			/* We'll assign a new address later */
+			r->end -= r->start;
+			r->start = 0;
 		}
 		if (!pass) {
 			r = &dev->resource[PCI_ROM_RESOURCE];
-- 
1.5.6.4

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