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| author | Max Filippov <jcmvbkbc@gmail.com> | 2017-06-05 09:43:51 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-17 04:41:58 (GMT) |
| commit | a2f68276822cd3a09ed9ae23e5c5e1cd8259af65 (patch) | |
| tree | 9bc3a7182cd01be8aee33ef098a1f37b843fd907 /arch/xtensa/kernel/irq.c | |
| parent | 57211e84dda0583b85326c07909c442ba950e0f0 (diff) | |
| download | linux-a2f68276822cd3a09ed9ae23e5c5e1cd8259af65.tar.xz | |
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 'arch/xtensa/kernel/irq.c')
| -rw-r--r-- | arch/xtensa/kernel/irq.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c index 4ac3d23..4416944 100644 --- a/arch/xtensa/kernel/irq.c +++ b/arch/xtensa/kernel/irq.c @@ -34,11 +34,6 @@ asmlinkage void do_IRQ(int hwirq, struct pt_regs *regs) { int irq = irq_find_mapping(NULL, hwirq); - if (hwirq >= NR_IRQS) { - printk(KERN_EMERG "%s: cannot handle IRQ %d\n", - __func__, hwirq); - } - #ifdef CONFIG_DEBUG_STACKOVERFLOW /* Debugging check for stack overflow: is there less than 1KB free? */ { |