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Commit e242114a authored by chenhui zhao's avatar chenhui zhao Committed by Benjamin Herrenschmidt
Browse files

powerpc/mpic: Fix irq distribution problem when MPIC_SINGLE_DEST_CPU 



For the mpic with a flag MPIC_SINGLE_DEST_CPU, only one bit should be
set in interrupt destination registers.

The code is applicable to 64-bit platforms as well as 32-bit.

Signed-off-by: default avatarZhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 2b3f8e87

arch/powerpc/sysdev/mpic.c

+2 −2
Original line number Diff line number Diff line
@@ -54,7 +54,7 @@ static DEFINE_RAW_SPINLOCK(mpic_lock); 


#ifdef CONFIG_PPC32	/* XXX for now */

#ifdef CONFIG_IRQ_ALL_CPUS

#define distribute_irqs	(!(mpic->flags & MPIC_SINGLE_DEST_CPU))

#define distribute_irqs	(1)

#else

#define distribute_irqs	(0)

#endif
@@ -1703,7 +1703,7 @@ void mpic_setup_this_cpu(void) 
	 * it differently, then we should make sure we also change the default

	 * values of irq_desc[].affinity in irq.c.

 	 */

	if (distribute_irqs) {

	if (distribute_irqs && !(mpic->flags & MPIC_SINGLE_DEST_CPU)) {

	 	for (i = 0; i < mpic->num_sources ; i++)

			mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),

				mpic_irq_read(i, MPIC_INFO(IRQ_DESTINATION)) | msk);