diff options
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/chip.c | 1 | ||||
| -rw-r--r-- | kernel/irq/handle.c | 5 | ||||
| -rw-r--r-- | kernel/irq/manage.c | 38 | ||||
| -rw-r--r-- | kernel/irq/numa_migrate.c | 11 | ||||
| -rw-r--r-- | kernel/irq/proc.c | 32 |
5 files changed, 55 insertions, 32 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index b343deedae91..f63c706d25e1 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -125,6 +125,7 @@ int set_irq_type(unsigned int irq, unsigned int type) return -ENODEV; } + type &= IRQ_TYPE_SENSE_MASK; if (type == IRQ_TYPE_NONE) return 0; diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c index f1a23069c20a..6492400cb50d 100644 --- a/kernel/irq/handle.c +++ b/kernel/irq/handle.c @@ -422,11 +422,8 @@ out: } #endif - -#ifdef CONFIG_TRACE_IRQFLAGS void early_init_irq_lock_class(void) { -#ifndef CONFIG_SPARSE_IRQ struct irq_desc *desc; int i; @@ -436,9 +433,7 @@ void early_init_irq_lock_class(void) lockdep_set_class(&desc->lock, &irq_desc_lock_class); } -#endif } -#endif #ifdef CONFIG_SPARSE_IRQ unsigned int kstat_irqs_cpu(unsigned int irq, int cpu) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 10ad2f87ed9a..cd0cd8dcb345 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -16,8 +16,15 @@ #include "internals.h" #ifdef CONFIG_SMP +cpumask_var_t irq_default_affinity; -cpumask_t irq_default_affinity = CPU_MASK_ALL; +static int init_irq_default_affinity(void) +{ + alloc_cpumask_var(&irq_default_affinity, GFP_KERNEL); + cpumask_setall(irq_default_affinity); + return 0; +} +core_initcall(init_irq_default_affinity); /** * synchronize_irq - wait for pending IRQ handlers (on other CPUs) @@ -127,7 +134,7 @@ int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc) desc->status &= ~IRQ_AFFINITY_SET; } - cpumask_and(&desc->affinity, cpu_online_mask, &irq_default_affinity); + cpumask_and(&desc->affinity, cpu_online_mask, irq_default_affinity); set_affinity: desc->chip->set_affinity(irq, &desc->affinity); @@ -368,16 +375,18 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq, return 0; } - ret = chip->set_type(irq, flags & IRQF_TRIGGER_MASK); + /* caller masked out all except trigger mode flags */ + ret = chip->set_type(irq, flags); if (ret) pr_err("setting trigger mode %d for irq %u failed (%pF)\n", - (int)(flags & IRQF_TRIGGER_MASK), - irq, chip->set_type); + (int)flags, irq, chip->set_type); else { + if (flags & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) + flags |= IRQ_LEVEL; /* note that IRQF_TRIGGER_MASK == IRQ_TYPE_SENSE_MASK */ - desc->status &= ~IRQ_TYPE_SENSE_MASK; - desc->status |= flags & IRQ_TYPE_SENSE_MASK; + desc->status &= ~(IRQ_LEVEL | IRQ_TYPE_SENSE_MASK); + desc->status |= flags; } return ret; @@ -457,7 +466,8 @@ __setup_irq(unsigned int irq, struct irq_desc * desc, struct irqaction *new) /* Setup the type (level, edge polarity) if configured: */ if (new->flags & IRQF_TRIGGER_MASK) { - ret = __irq_set_trigger(desc, irq, new->flags); + ret = __irq_set_trigger(desc, irq, + new->flags & IRQF_TRIGGER_MASK); if (ret) { spin_unlock_irqrestore(&desc->lock, flags); @@ -671,6 +681,18 @@ int request_irq(unsigned int irq, irq_handler_t handler, struct irq_desc *desc; int retval; + /* + * handle_IRQ_event() always ignores IRQF_DISABLED except for + * the _first_ irqaction (sigh). That can cause oopsing, but + * the behavior is classified as "will not fix" so we need to + * start nudging drivers away from using that idiom. + */ + if ((irqflags & (IRQF_SHARED|IRQF_DISABLED)) + == (IRQF_SHARED|IRQF_DISABLED)) + pr_warning("IRQ %d/%s: IRQF_DISABLED is not " + "guaranteed on shared IRQs\n", + irq, devname); + #ifdef CONFIG_LOCKDEP /* * Lockdep wants atomic interrupt handlers: diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c index 0178e2296990..089c3746358a 100644 --- a/kernel/irq/numa_migrate.c +++ b/kernel/irq/numa_migrate.c @@ -1,13 +1,8 @@ /* - * linux/kernel/irq/handle.c - * - * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar - * Copyright (C) 2005-2006, Thomas Gleixner, Russell King - * - * This file contains the core interrupt handling code. - * - * Detailed information is available in Documentation/DocBook/genericirq + * NUMA irq-desc migration code * + * Migrate IRQ data structures (irq_desc, chip_data, etc.) over to + * the new "home node" of the IRQ. */ #include <linux/irq.h> diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index d2c0e5ee53c5..2abd3a7716ed 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -20,7 +20,7 @@ static struct proc_dir_entry *root_irq_dir; static int irq_affinity_proc_show(struct seq_file *m, void *v) { struct irq_desc *desc = irq_to_desc((long)m->private); - cpumask_t *mask = &desc->affinity; + const struct cpumask *mask = &desc->affinity; #ifdef CONFIG_GENERIC_PENDING_IRQ if (desc->status & IRQ_MOVE_PENDING) @@ -93,7 +93,7 @@ static const struct file_operations irq_affinity_proc_fops = { static int default_affinity_show(struct seq_file *m, void *v) { - seq_cpumask(m, &irq_default_affinity); + seq_cpumask(m, irq_default_affinity); seq_putc(m, '\n'); return 0; } @@ -101,27 +101,37 @@ static int default_affinity_show(struct seq_file *m, void *v) static ssize_t default_affinity_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { - cpumask_t new_value; + cpumask_var_t new_value; int err; - err = cpumask_parse_user(buffer, count, &new_value); + if (!alloc_cpumask_var(&new_value, GFP_KERNEL)) + return -ENOMEM; + + err = cpumask_parse_user(buffer, count, new_value); if (err) - return err; + goto out; - if (!is_affinity_mask_valid(new_value)) - return -EINVAL; + if (!is_affinity_mask_valid(new_value)) { + err = -EINVAL; + goto out; + } /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least * one online CPU still has to be targeted. */ - if (!cpus_intersects(new_value, cpu_online_map)) - return -EINVAL; + if (!cpumask_intersects(new_value, cpu_online_mask)) { + err = -EINVAL; + goto out; + } - irq_default_affinity = new_value; + cpumask_copy(irq_default_affinity, new_value); + err = count; - return count; +out: + free_cpumask_var(new_value); + return err; } static int default_affinity_open(struct inode *inode, struct file *file) |