Merge branch 'linus' into x86/apic-cleanups

[cascardo/linux.git] / arch / x86 / kernel / apic / io_apic.c

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index f6cd5b4..52735a7 100644 (file)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -125,6 +125,26 @@ static int __init parse_noapic(char *str)
 }
 early_param("noapic", parse_noapic);
 
+/* Will be called in mpparse/acpi/sfi codes for saving IRQ info */
+void mp_save_irq(struct mpc_intsrc *m)
+{
+       int i;
+
+       apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
+               " IRQ %02x, APIC ID %x, APIC INT %02x\n",
+               m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbus,
+               m->srcbusirq, m->dstapic, m->dstirq);
+
+       for (i = 0; i < mp_irq_entries; i++) {
+               if (!memcmp(&mp_irqs[i], m, sizeof(*m)))
+                       return;
+       }
+
+       memcpy(&mp_irqs[mp_irq_entries], m, sizeof(*m));
+       if (++mp_irq_entries == MAX_IRQ_SOURCES)
+               panic("Max # of irq sources exceeded!!\n");
+}
+
 struct irq_pin_list {
        int apic, pin;
        struct irq_pin_list *next;
@@ -135,6 +155,7 @@ static struct irq_pin_list *alloc_irq_pin_list(int node)
        return kzalloc_node(sizeof(struct irq_pin_list), GFP_KERNEL, node);
 }
 
+
 /* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
 #ifdef CONFIG_SPARSE_IRQ
 static struct irq_cfg irq_cfgx[NR_IRQS_LEGACY];
@@ -2006,9 +2027,12 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void)
                                                = mp_ioapics[apic_id].apicid;
 
                /*
-                * Read the right value from the MPC table and
-                * write it into the ID register.
+                * Update the ID register according to the right value
+                * from the MPC table if they are different.
                 */
+               if (mp_ioapics[apic_id].apicid == reg_00.bits.ID)
+                       continue;
+
                apic_printk(APIC_VERBOSE, KERN_INFO
                        "...changing IO-APIC physical APIC ID to %d ...",
                        mp_ioapics[apic_id].apicid);