x86: calculate nr_irqs_gsi correctly.

Should be a typo, this issue is introduced by Cset20076,
and it may break VT-d device assignment.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>

diff --git a/xen/arch/x86/io_apic.c b/xen/arch/x86/io_apic.c
index 917e4dd9b035ad87b356720af6b72d60823c22f6..ea7f8b2fa4f0b3b9a4a2cc0475f99f160981bae8 100644 (file)
--- a/xen/arch/x86/io_apic.c
+++ b/xen/arch/x86/io_apic.c
@@ -2393,7 +2393,7 @@ void __init init_ioapic_mappings(void)
         }
     }
 
-    nr_irqs_gsi = max(nr_irqs, highest_gsi());
+    nr_irqs_gsi = max(nr_irqs_gsi, highest_gsi());
 
     if ( !smp_found_config || skip_ioapic_setup || nr_irqs_gsi < 16 )
         nr_irqs_gsi = 16;