Merge branch 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 irq fixes from Ingo Molnar: "Two changes: a cpu-hotplug/irq race fix, plus a HyperV related fix" * 'x86-irq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/irq: Fix fixup_irqs() error handling x86, irq, pic: Probe for legacy PIC and set legacy_pic appropriately
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71998d1be4
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@ -2297,7 +2297,7 @@ int __ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask,
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int err;
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if (!config_enabled(CONFIG_SMP))
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return -1;
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return -EPERM;
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if (!cpumask_intersects(mask, cpu_online_mask))
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return -EINVAL;
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@ -2328,7 +2328,7 @@ int native_ioapic_set_affinity(struct irq_data *data,
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int ret;
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if (!config_enabled(CONFIG_SMP))
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return -1;
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return -EPERM;
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raw_spin_lock_irqsave(&ioapic_lock, flags);
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ret = __ioapic_set_affinity(data, mask, &dest);
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@ -3001,9 +3001,11 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force)
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struct irq_cfg *cfg = data->chip_data;
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struct msi_msg msg;
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unsigned int dest;
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int ret;
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if (__ioapic_set_affinity(data, mask, &dest))
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return -1;
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ret = __ioapic_set_affinity(data, mask, &dest);
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if (ret)
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return ret;
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__get_cached_msi_msg(data->msi_desc, &msg);
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@ -3100,9 +3102,11 @@ dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask,
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struct irq_cfg *cfg = data->chip_data;
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unsigned int dest, irq = data->irq;
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struct msi_msg msg;
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int ret;
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if (__ioapic_set_affinity(data, mask, &dest))
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return -1;
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ret = __ioapic_set_affinity(data, mask, &dest);
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if (ret)
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return ret;
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dmar_msi_read(irq, &msg);
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@ -3149,9 +3153,11 @@ static int hpet_msi_set_affinity(struct irq_data *data,
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struct irq_cfg *cfg = data->chip_data;
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struct msi_msg msg;
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unsigned int dest;
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int ret;
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if (__ioapic_set_affinity(data, mask, &dest))
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return -1;
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ret = __ioapic_set_affinity(data, mask, &dest);
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if (ret)
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return ret;
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hpet_msi_read(data->handler_data, &msg);
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@ -3218,9 +3224,11 @@ ht_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force)
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{
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struct irq_cfg *cfg = data->chip_data;
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unsigned int dest;
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int ret;
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if (__ioapic_set_affinity(data, mask, &dest))
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return -1;
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ret = __ioapic_set_affinity(data, mask, &dest);
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if (ret)
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return ret;
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target_ht_irq(data->irq, dest, cfg->vector);
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return IRQ_SET_MASK_OK_NOCOPY;
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@ -132,15 +132,6 @@ static void __init ms_hyperv_init_platform(void)
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lapic_timer_frequency = hv_lapic_frequency;
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printk(KERN_INFO "HyperV: LAPIC Timer Frequency: %#x\n",
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lapic_timer_frequency);
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/*
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* On Hyper-V, when we are booting off an EFI firmware stack,
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* we do not have many legacy devices including PIC, PIT etc.
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*/
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if (efi_enabled(EFI_BOOT)) {
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printk(KERN_INFO "HyperV: Using null_legacy_pic\n");
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legacy_pic = &null_legacy_pic;
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}
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}
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#endif
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@ -299,13 +299,31 @@ static void unmask_8259A(void)
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static void init_8259A(int auto_eoi)
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{
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unsigned long flags;
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unsigned char probe_val = ~(1 << PIC_CASCADE_IR);
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unsigned char new_val;
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i8259A_auto_eoi = auto_eoi;
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raw_spin_lock_irqsave(&i8259A_lock, flags);
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outb(0xff, PIC_MASTER_IMR); /* mask all of 8259A-1 */
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/*
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* Check to see if we have a PIC.
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* Mask all except the cascade and read
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* back the value we just wrote. If we don't
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* have a PIC, we will read 0xff as opposed to the
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* value we wrote.
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*/
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outb(0xff, PIC_SLAVE_IMR); /* mask all of 8259A-2 */
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outb(probe_val, PIC_MASTER_IMR);
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new_val = inb(PIC_MASTER_IMR);
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if (new_val != probe_val) {
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printk(KERN_INFO "Using NULL legacy PIC\n");
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legacy_pic = &null_legacy_pic;
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raw_spin_unlock_irqrestore(&i8259A_lock, flags);
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return;
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}
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outb(0xff, PIC_MASTER_IMR); /* mask all of 8259A-1 */
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/*
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* outb_pic - this has to work on a wide range of PC hardware.
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@ -365,6 +365,7 @@ void fixup_irqs(void)
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struct irq_desc *desc;
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struct irq_data *data;
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struct irq_chip *chip;
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int ret;
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for_each_irq_desc(irq, desc) {
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int break_affinity = 0;
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@ -403,10 +404,14 @@ void fixup_irqs(void)
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if (!irqd_can_move_in_process_context(data) && chip->irq_mask)
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chip->irq_mask(data);
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if (chip->irq_set_affinity)
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chip->irq_set_affinity(data, affinity, true);
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else if (!(warned++))
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if (chip->irq_set_affinity) {
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ret = chip->irq_set_affinity(data, affinity, true);
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if (ret == -ENOSPC)
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pr_crit("IRQ %d set affinity failed because there are no available vectors. The device assigned to this IRQ is unstable.\n", irq);
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} else {
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if (!(warned++))
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set_affinity = 0;
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}
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/*
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* We unmask if the irq was not marked masked by the
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