From: Jacob Pan <jacob.jun.pan@linux.intel.com>
Date: Fri, 15 Jul 2011 13:39:07 +0000 (+0100)
Subject: x86/apic: do not clear nr_irqs_gsi if no legacy irqs
X-Git-Tag: 2.1b_release~2211
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=67c3e9cc2a07fe390a703eea190cffc50fc2915d;p=kernel%2Fkernel-mfld-blackbay.git

x86/apic: do not clear nr_irqs_gsi if no legacy irqs

nr_legacy_irqs is set in probe_nr_irqs_gsi, we should not clear it after that.
Otherwise, the result is that MSI irqs will be allocated from the wrong range
for the systems without legacy PIC.

Change-Id: Ib73f1de23d34cf5b8b549d43c371d7d8a58ecb52
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
---

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index e529339..2b92e1d 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -197,10 +197,8 @@ int __init arch_early_irq_init(void)
 	struct irq_cfg *cfg;
 	int count, node, i;
 
-	if (!legacy_pic->nr_legacy_irqs) {
-		nr_irqs_gsi = 0;
+	if (!legacy_pic->nr_legacy_irqs)
 		io_apic_irqs = ~0UL;
-	}
 
 	for (i = 0; i < nr_ioapics; i++) {
 		ioapics[i].saved_registers =