diff options
Diffstat (limited to 'arch/x86/kernel/apic/io_apic.c')
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 8d80a8f1d670..a44dce8cc559 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -86,6 +86,7 @@ static DEFINE_RAW_SPINLOCK(ioapic_lock); static DEFINE_RAW_SPINLOCK(vector_lock); static DEFINE_MUTEX(ioapic_mutex); static unsigned int ioapic_dynirq_base; +static int ioapic_initialized; struct mp_pin_info { int trigger; @@ -1034,13 +1035,8 @@ static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin, struct irq_domain *domain = mp_ioapic_irqdomain(ioapic); struct mp_pin_info *info = mp_pin_info(ioapic, pin); - if (!domain) { - /* - * Provide an identity mapping of gsi == irq except on truly - * weird platforms that have non isa irqs in the first 16 gsis. - */ - return gsi >= nr_legacy_irqs() ? gsi : gsi_top + gsi; - } + if (!domain) + return -1; mutex_lock(&ioapic_mutex); @@ -2986,6 +2982,8 @@ void __init setup_IO_APIC(void) init_IO_APIC_traps(); if (nr_legacy_irqs()) check_timer(); + + ioapic_initialized = 1; } /* @@ -3461,12 +3459,11 @@ static int __init io_apic_get_redir_entries(int ioapic) unsigned int arch_dynirq_lower_bound(unsigned int from) { - unsigned int min = gsi_top + nr_legacy_irqs(); - - if (ioapic_dynirq_base) - return ioapic_dynirq_base; - - return from < min ? min : from; + /* + * dmar_alloc_hwirq() may be called before setup_IO_APIC(), so use + * gsi_top if ioapic_dynirq_base hasn't been initialized yet. + */ + return ioapic_initialized ? ioapic_dynirq_base : gsi_top; } int __init arch_probe_nr_irqs(void) @@ -3841,10 +3838,7 @@ void __init mp_register_ioapic(int id, u32 address, u32 gsi_base, ioapics[idx].mp_config.flags = MPC_APIC_USABLE; ioapics[idx].mp_config.apicaddr = address; ioapics[idx].irqdomain = NULL; - if (cfg) - ioapics[idx].irqdomain_cfg = *cfg; - else - ioapics[idx].irqdomain_cfg.type = IOAPIC_DOMAIN_INVALID; + ioapics[idx].irqdomain_cfg = *cfg; set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); |