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: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 0a13ecb..3cc2f91 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -54,7 +54,7 @@
#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 @@
* 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);