diff options
author | Max Filippov <jcmvbkbc@gmail.com> | 2017-06-05 02:43:51 -0700 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 06:41:58 +0200 |
commit | a2f68276822cd3a09ed9ae23e5c5e1cd8259af65 (patch) | |
tree | 9bc3a7182cd01be8aee33ef098a1f37b843fd907 /drivers/irqchip/irq-xtensa-mx.c | |
parent | 57211e84dda0583b85326c07909c442ba950e0f0 (diff) |
xtensa: don't use linux IRQ #0
commit e5c86679d5e864947a52fb31e45a425dea3e7fa9 upstream.
Linux IRQ #0 is reserved for error reporting and may not be used.
Increase NR_IRQS for one additional slot and increase
irq_domain_add_legacy parameter first_irq value to 1, so that linux
IRQ #0 is not associated with hardware IRQ #0 in legacy IRQ domains.
Introduce macro XTENSA_PIC_LINUX_IRQ for static translation of xtensa
PIC hardware IRQ # to linux IRQ #. Use this macro in XTFPGA platform
data definitions.
This fixes inability to use hardware IRQ #0 in configurations that don't
use device tree and allows for non-identity mapping between linux IRQ #
and hardware IRQ #.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/irqchip/irq-xtensa-mx.c')
-rw-r--r-- | drivers/irqchip/irq-xtensa-mx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-xtensa-mx.c b/drivers/irqchip/irq-xtensa-mx.c index bb3ac5fe5846..72a391e01011 100644 --- a/drivers/irqchip/irq-xtensa-mx.c +++ b/drivers/irqchip/irq-xtensa-mx.c @@ -142,7 +142,7 @@ static struct irq_chip xtensa_mx_irq_chip = { int __init xtensa_mx_init_legacy(struct device_node *interrupt_parent) { struct irq_domain *root_domain = - irq_domain_add_legacy(NULL, NR_IRQS, 0, 0, + irq_domain_add_legacy(NULL, NR_IRQS - 1, 1, 0, &xtensa_mx_irq_domain_ops, &xtensa_mx_irq_chip); irq_set_default_host(root_domain); |