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| author | Ingo Molnar <mingo@elte.hu> | 2010-02-26 11:17:16 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-02-27 12:49:56 +0100 |
| commit | 21c2fd9970cc8e457058f84016450a2e9876125e (patch) | |
| tree | 252bf6badc38550bc16cb3855278f3f2160ec1dc /arch/x86/kernel/apic | |
| parent | Merge branch 'x86/irq' into x86/apic (diff) | |
| download | linux-21c2fd9970cc8e457058f84016450a2e9876125e.tar.xz linux-21c2fd9970cc8e457058f84016450a2e9876125e.zip | |
x86: apic: Fix mismerge, add arch_probe_nr_irqs() again
Merge commit aef55d4922 mis-merged io_apic.c so we lost the
arch_probe_nr_irqs() method.
This caused subtle boot breakages (udev confusion likely
due to missing drivers) with certain configs.
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <20100207210250.GB8256@jenkins.home.ifup.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/io_apic.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 979589881c80..72ac2a332993 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -3876,6 +3876,28 @@ void __init probe_nr_irqs_gsi(void) printk(KERN_DEBUG "nr_irqs_gsi: %d\n", nr_irqs_gsi); } +#ifdef CONFIG_SPARSE_IRQ +int __init arch_probe_nr_irqs(void) +{ + int nr; + + if (nr_irqs > (NR_VECTORS * nr_cpu_ids)) + nr_irqs = NR_VECTORS * nr_cpu_ids; + + nr = nr_irqs_gsi + 8 * nr_cpu_ids; +#if defined(CONFIG_PCI_MSI) || defined(CONFIG_HT_IRQ) + /* + * for MSI and HT dyn irq + */ + nr += nr_irqs_gsi * 16; +#endif + if (nr < nr_irqs) + nr_irqs = nr; + + return 0; +} +#endif + static int __io_apic_set_pci_routing(struct device *dev, int irq, struct io_apic_irq_attr *irq_attr) { |