Commit c9d059de authored by Kenji Kaneshige's avatar Kenji Kaneshige Committed by Tony Luck
Browse files

[IA64] Fix IOSAPIC delivery mode setting 



Fix the problem that redirect hit bit in I/O SAPIC RTE is set even
when it must be disabled (e.g. nointroute boot option is set, CPU
hotplug is enabled or percpu vector is enabled).

Signed-off-by: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 4c013f5c

arch/ia64/kernel/iosapic.c

+15 −3
Original line number Diff line number Diff line
@@ -748,6 +748,15 @@ get_target_cpu (unsigned int gsi, int irq) 
#endif

}



static inline unsigned char choose_dmode(void)

{

#ifdef CONFIG_SMP

	if (smp_int_redirect & SMP_IRQ_REDIRECTION)

		return IOSAPIC_LOWEST_PRIORITY;

#endif

	return IOSAPIC_FIXED;

}



/*

 * ACPI can describe IOSAPIC interrupts via static tables and namespace

 * methods.  This provides an interface to register those interrupts and
@@ -762,6 +771,7 @@ iosapic_register_intr (unsigned int gsi, 
	unsigned long flags;

	struct iosapic_rte_info *rte;

	u32 low32;

	unsigned char dmode;



	/*

	 * If this GSI has already been registered (i.e., it's a
@@ -791,8 +801,8 @@ iosapic_register_intr (unsigned int gsi, 


	spin_lock(&irq_desc[irq].lock);

	dest = get_target_cpu(gsi, irq);

	err = register_intr(gsi, irq, IOSAPIC_LOWEST_PRIORITY,

			    polarity, trigger);

	dmode = choose_dmode();

	err = register_intr(gsi, irq, dmode, polarity, trigger);

	if (err < 0) {

		spin_unlock(&irq_desc[irq].lock);

		irq = err;
@@ -961,10 +971,12 @@ iosapic_override_isa_irq (unsigned int isa_irq, unsigned int gsi, 
{

	int vector, irq;

	unsigned int dest = cpu_physical_id(smp_processor_id());

	unsigned char dmode;



	irq = vector = isa_irq_to_vector(isa_irq);

	BUG_ON(bind_irq_vector(irq, vector, CPU_MASK_ALL));

	register_intr(gsi, irq, IOSAPIC_LOWEST_PRIORITY, polarity, trigger);

	dmode = choose_dmode();

	register_intr(gsi, irq, dmode, polarity, trigger);



	DBG("ISA: IRQ %u -> GSI %u (%s,%s) -> CPU %d (0x%04x) vector %d\n",

	    isa_irq, gsi, trigger == IOSAPIC_EDGE ? "edge" : "level",