linux-kernel - [PATCH] x86: remove unneeded check in mmconf reject

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Date:	Wed, 20 Feb 2008 22:21:57 -0800
From:	Yinghai Lu <Yinghai.Lu@....COM>
To:	Ingo Molnar <mingo@...e.hu>, Greg KH <greg@...ah.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] x86: remove unneeded check in mmconf reject


mmconfig is only used to access ext conf space.
so don't need to reject MFG that only have one entry and only handle bus0

Signed-off-by: Yinghai Lu <yinghai.lu@....com>

Index: linux-2.6/arch/x86/pci/mmconfig-shared.c
===================================================================
--- linux-2.6.orig/arch/x86/pci/mmconfig-shared.c
+++ linux-2.6/arch/x86/pci/mmconfig-shared.c
@@ -308,18 +308,6 @@ static void __init pci_mmcfg_reject_brok
 
 	cfg = &pci_mmcfg_config[0];
 
-	/*
-	 * Handle more broken MCFG tables on Asus etc.
-	 * They only contain a single entry for bus 0-0.
-	 */
-	if (pci_mmcfg_config_num == 1 &&
-	    cfg->pci_segment == 0 &&
-	    (cfg->start_bus_number | cfg->end_bus_number) == 0) {
-		printk(KERN_ERR "PCI: start and end of bus number is 0. "
-		       "Rejected as broken MCFG.\n");
-		goto reject;
-	}
-
 	for (i = 0; i < pci_mmcfg_config_num; i++) {
 		int valid = 0;
 		u32 size = (cfg->end_bus_number + 1) << 20;
--
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