Commit-ID: b81975eade8c6495f3c4d6746d22bdc95f617777 Gitweb: http://git.kernel.org/tip/b81975eade8c6495f3c4d6746d22bdc95f617777 Author: Jiang Liu <jiang....@linux.intel.com> AuthorDate: Mon, 9 Jun 2014 16:20:11 +0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Sat, 21 Jun 2014 23:05:44 +0200
x86, irq: Clean up irqdomain transition code Now we have completely switched to irqdomain, so clean up transition code in IOAPIC drivers. Signed-off-by: Jiang Liu <jiang....@linux.intel.com> Cc: Konrad Rzeszutek Wilk <konrad.w...@oracle.com> Cc: Tony Luck <tony.l...@intel.com> Cc: Joerg Roedel <j...@8bytes.org> Cc: Paul Gortmaker <paul.gortma...@windriver.com> Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org> Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org> Cc: Grant Likely <grant.lik...@linaro.org> Cc: Rafael J. Wysocki <r...@rjwysocki.net> Cc: Bjorn Helgaas <bhelg...@google.com> Cc: Randy Dunlap <rdun...@infradead.org> Cc: Yinghai Lu <ying...@kernel.org> Link: http://lkml.kernel.org/r/1402302011-23642-43-git-send-email-jiang....@linux.intel.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- arch/x86/kernel/apic/io_apic.c | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 8d80a8f..a44dce8 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
