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Diffstat (limited to 'kernel/irq')
-rw-r--r--kernel/irq/chip.c1
-rw-r--r--kernel/irq/handle.c5
-rw-r--r--kernel/irq/manage.c38
-rw-r--r--kernel/irq/numa_migrate.c11
-rw-r--r--kernel/irq/proc.c32
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)
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-18 00:02:15 +0000