From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com ([192.55.52.88]:59321 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754016AbaFIIZC (ORCPT ); Mon, 9 Jun 2014 04:25:02 -0400 From: Jiang Liu To: Benjamin Herrenschmidt , Thomas Gleixner , Grant Likely , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Bjorn Helgaas , Randy Dunlap , Yinghai Lu , x86@kernel.org, Jiang Liu Cc: Konrad Rzeszutek Wilk , Andrew Morton , Tony Luck , Joerg Roedel , Paul Gortmaker , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org, Ingo Molnar Subject: [Patch V4 42/42] x86, irq: clean up irqdomain transition code Date: Mon, 9 Jun 2014 16:20:11 +0800 Message-Id: <1402302011-23642-43-git-send-email-jiang.liu@linux.intel.com> In-Reply-To: <1402302011-23642-1-git-send-email-jiang.liu@linux.intel.com> References: <1402302011-23642-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-pci-owner@vger.kernel.org List-ID: Now we have completely switched to irqdomain, so clean up transition code in IOAPIC drivers. Signed-off-by: Jiang Liu --- 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 60555354b331..26490336ef6f 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; } /* @@ -3457,12 +3455,11 @@ 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) @@ -3837,10 +3834,7 @@ 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); -- 1.7.10.4