linux-kernel - [PATCH 2.6.21 review I] [5/25] i386: revert i386-fix-the-verify_quirk_intel

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Date:	Sat, 10 Feb 2007 12:50:17 +0100 (CET)
From:	Andi Kleen <ak@...e.de>
To:	Andrew Morton <akpm@...l.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Andi Kleen <ak@...e.de>, Ingo Molnar <mingo@...e.hu>,
	patches@...-64.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.21 review I] [5/25] i386: revert i386-fix-the-verify_quirk_intel_irqbalance


From: Andrew Morton <akpm@...l.org>

This is unneeded with Ingo's genapic rework.

Cc: Suresh Siddha <suresh.b.siddha@...el.com>
Cc: Andi Kleen <ak@...e.de>
Cc: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Andrew Morton <akpm@...l.org>
Signed-off-by: Andi Kleen <ak@...e.de>

---

 arch/i386/kernel/quirks.c |   33 ++++-----------------------------
 1 file changed, 4 insertions(+), 29 deletions(-)

Index: linux/arch/i386/kernel/quirks.c
===================================================================
--- linux.orig/arch/i386/kernel/quirks.c
+++ linux/arch/i386/kernel/quirks.c
@@ -10,38 +10,13 @@
 #if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_SMP) && defined(CONFIG_PCI)
 static void __devinit verify_quirk_intel_irqbalance(struct pci_dev *dev)
 {
-	u8 config, rev;
-	u32 word;
-
-	/* BIOS may enable hardware IRQ balancing for
-	 * E7520/E7320/E7525(revision ID 0x9 and below)
-	 * based platforms.
-	 * For those platforms, make sure that the genapic is set to 'flat'
-	 */
-	pci_read_config_byte(dev, PCI_CLASS_REVISION, &rev);
-	if (rev > 0x9)
-		return;
-
-	/* enable access to config space*/
-	pci_read_config_byte(dev, 0xf4, &config);
-	pci_write_config_byte(dev, 0xf4, config|0x2);
-
-	/* read xTPR register */
-	raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
-
-	if (!(word & (1 << 13))) {
 #ifdef CONFIG_X86_64
-		if (genapic !=  &apic_flat)
-			panic("APIC mode must be flat on this system\n");
+	if (genapic !=  &apic_flat)
+		panic("APIC mode must be flat on this system\n");
 #elif defined(CONFIG_X86_GENERICARCH)
-		if (genapic != &apic_default)
-			panic("APIC mode must be default(flat) on this system. Use apic=default\n");
+	if (genapic != &apic_default)
+		panic("APIC mode must be default(flat) on this system. Use apic=default\n");
 #endif
-	}
-
-	/* put back the original value for config space*/
-	if (!(config & 0x2))
-		pci_write_config_byte(dev, 0xf4, config);
 }
 
 void __init quirk_intel_irqbalance(void)
-
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