diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2017-06-05 02:43:51 -0700 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-06-25 22:02:21 -0400 |
| commit | b865f707d7c61799b8808b060d0eae476a2b92f3 (patch) | |
| tree | 1239c4b70347c139f87d0d936cb7a5bc3567ade5 /drivers/irqchip | |
| parent | ddda59580e105f8886c17b20856cdeb53eb67e42 (diff) | |
xtensa: don't use linux IRQ #0
[ Upstream commit e5c86679d5e864947a52fb31e45a425dea3e7fa9 ]
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 #.
Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers/irqchip')
| -rw-r--r-- | drivers/irqchip/irq-xtensa-mx.c | 2 | ||||
| -rw-r--r-- | drivers/irqchip/irq-xtensa-pic.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/irqchip/irq-xtensa-mx.c b/drivers/irqchip/irq-xtensa-mx.c index e1c2f9632893..0bfffb72163c 100644 --- a/drivers/irqchip/irq-xtensa-mx.c +++ b/drivers/irqchip/irq-xtensa-mx.c @@ -143,7 +143,7 @@ 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); diff --git a/drivers/irqchip/irq-xtensa-pic.c b/drivers/irqchip/irq-xtensa-pic.c index 7d71126d1ce5..79eb90f26a74 100644 --- a/drivers/irqchip/irq-xtensa-pic.c +++ b/drivers/irqchip/irq-xtensa-pic.c @@ -90,7 +90,7 @@ static struct irq_chip xtensa_irq_chip = { int __init xtensa_pic_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_irq_domain_ops, &xtensa_irq_chip); irq_set_default_host(root_domain); return 0; |