summaryrefslogtreecommitdiff
path: root/kernel/irq/chip.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/irq/chip.c')
-rw-r--r--kernel/irq/chip.c144
1 files changed, 89 insertions, 55 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index c1660194d115..d70394f12ee9 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -18,11 +18,7 @@
#include "internals.h"
-/**
- * dynamic_irq_init - initialize a dynamically allocated irq
- * @irq: irq number to initialize
- */
-void dynamic_irq_init(unsigned int irq)
+static void dynamic_irq_init_x(unsigned int irq, bool keep_chip_data)
{
struct irq_desc *desc;
unsigned long flags;
@@ -34,14 +30,15 @@ void dynamic_irq_init(unsigned int irq)
}
/* Ensure we don't have left over values from a previous use of this irq */
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->status = IRQ_DISABLED;
desc->chip = &no_irq_chip;
desc->handle_irq = handle_bad_irq;
desc->depth = 1;
desc->msi_desc = NULL;
desc->handler_data = NULL;
- desc->chip_data = NULL;
+ if (!keep_chip_data)
+ desc->chip_data = NULL;
desc->action = NULL;
desc->irq_count = 0;
desc->irqs_unhandled = 0;
@@ -51,14 +48,30 @@ void dynamic_irq_init(unsigned int irq)
cpumask_clear(desc->pending_mask);
#endif
#endif
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
}
/**
- * dynamic_irq_cleanup - cleanup a dynamically allocated irq
+ * dynamic_irq_init - initialize a dynamically allocated irq
* @irq: irq number to initialize
*/
-void dynamic_irq_cleanup(unsigned int irq)
+void dynamic_irq_init(unsigned int irq)
+{
+ dynamic_irq_init_x(irq, false);
+}
+
+/**
+ * dynamic_irq_init_keep_chip_data - initialize a dynamically allocated irq
+ * @irq: irq number to initialize
+ *
+ * does not set irq_to_desc(irq)->chip_data to NULL
+ */
+void dynamic_irq_init_keep_chip_data(unsigned int irq)
+{
+ dynamic_irq_init_x(irq, true);
+}
+
+static void dynamic_irq_cleanup_x(unsigned int irq, bool keep_chip_data)
{
struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
@@ -68,21 +81,42 @@ void dynamic_irq_cleanup(unsigned int irq)
return;
}
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
if (desc->action) {
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
WARN(1, KERN_ERR "Destroying IRQ%d without calling free_irq\n",
irq);
return;
}
desc->msi_desc = NULL;
desc->handler_data = NULL;
- desc->chip_data = NULL;
+ if (!keep_chip_data)
+ desc->chip_data = NULL;
desc->handle_irq = handle_bad_irq;
desc->chip = &no_irq_chip;
desc->name = NULL;
clear_kstat_irqs(desc);
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+/**
+ * dynamic_irq_cleanup - cleanup a dynamically allocated irq
+ * @irq: irq number to initialize
+ */
+void dynamic_irq_cleanup(unsigned int irq)
+{
+ dynamic_irq_cleanup_x(irq, false);
+}
+
+/**
+ * dynamic_irq_cleanup_keep_chip_data - cleanup a dynamically allocated irq
+ * @irq: irq number to initialize
+ *
+ * does not set irq_to_desc(irq)->chip_data to NULL
+ */
+void dynamic_irq_cleanup_keep_chip_data(unsigned int irq)
+{
+ dynamic_irq_cleanup_x(irq, true);
}
@@ -104,10 +138,10 @@ int set_irq_chip(unsigned int irq, struct irq_chip *chip)
if (!chip)
chip = &no_irq_chip;
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
irq_chip_set_defaults(chip);
desc->chip = chip;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
@@ -133,9 +167,9 @@ int set_irq_type(unsigned int irq, unsigned int type)
if (type == IRQ_TYPE_NONE)
return 0;
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
ret = __irq_set_trigger(desc, irq, type);
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}
EXPORT_SYMBOL(set_irq_type);
@@ -158,19 +192,19 @@ int set_irq_data(unsigned int irq, void *data)
return -EINVAL;
}
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->handler_data = data;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
EXPORT_SYMBOL(set_irq_data);
/**
- * set_irq_data - set irq type data for an irq
+ * set_irq_msi - set MSI descriptor data for an irq
* @irq: Interrupt number
* @entry: Pointer to MSI descriptor data
*
- * Set the hardware irq controller data for an irq
+ * Set the MSI descriptor entry for an irq
*/
int set_irq_msi(unsigned int irq, struct msi_desc *entry)
{
@@ -183,11 +217,11 @@ int set_irq_msi(unsigned int irq, struct msi_desc *entry)
return -EINVAL;
}
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->msi_desc = entry;
if (entry)
entry->irq = irq;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
@@ -214,9 +248,9 @@ int set_irq_chip_data(unsigned int irq, void *data)
return -EINVAL;
}
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->chip_data = data;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
@@ -241,12 +275,12 @@ void set_irq_nested_thread(unsigned int irq, int nest)
if (!desc)
return;
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
if (nest)
desc->status |= IRQ_NESTED_THREAD;
else
desc->status &= ~IRQ_NESTED_THREAD;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
}
EXPORT_SYMBOL_GPL(set_irq_nested_thread);
@@ -343,7 +377,7 @@ void handle_nested_irq(unsigned int irq)
might_sleep();
- spin_lock_irq(&desc->lock);
+ raw_spin_lock_irq(&desc->lock);
kstat_incr_irqs_this_cpu(irq, desc);
@@ -352,17 +386,17 @@ void handle_nested_irq(unsigned int irq)
goto out_unlock;
desc->status |= IRQ_INPROGRESS;
- spin_unlock_irq(&desc->lock);
+ raw_spin_unlock_irq(&desc->lock);
action_ret = action->thread_fn(action->irq, action->dev_id);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- spin_lock_irq(&desc->lock);
+ raw_spin_lock_irq(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out_unlock:
- spin_unlock_irq(&desc->lock);
+ raw_spin_unlock_irq(&desc->lock);
}
EXPORT_SYMBOL_GPL(handle_nested_irq);
@@ -384,7 +418,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
struct irqaction *action;
irqreturn_t action_ret;
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
@@ -396,16 +430,16 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
goto out_unlock;
desc->status |= IRQ_INPROGRESS;
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out_unlock:
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
}
/**
@@ -424,7 +458,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
struct irqaction *action;
irqreturn_t action_ret;
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
mask_ack_irq(desc, irq);
if (unlikely(desc->status & IRQ_INPROGRESS))
@@ -441,13 +475,13 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
goto out_unlock;
desc->status |= IRQ_INPROGRESS;
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
if (unlikely(desc->status & IRQ_ONESHOT))
@@ -455,7 +489,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
else if (!(desc->status & IRQ_DISABLED) && desc->chip->unmask)
desc->chip->unmask(irq);
out_unlock:
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
}
EXPORT_SYMBOL_GPL(handle_level_irq);
@@ -475,7 +509,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
struct irqaction *action;
irqreturn_t action_ret;
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out;
@@ -497,18 +531,18 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
desc->status |= IRQ_INPROGRESS;
desc->status &= ~IRQ_PENDING;
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~IRQ_INPROGRESS;
out:
desc->chip->eoi(irq);
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
}
/**
@@ -530,7 +564,7 @@ out:
void
handle_edge_irq(unsigned int irq, struct irq_desc *desc)
{
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
@@ -576,21 +610,21 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
}
desc->status &= ~IRQ_PENDING;
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, action);
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- spin_lock(&desc->lock);
+ raw_spin_lock(&desc->lock);
} while ((desc->status & (IRQ_PENDING | IRQ_DISABLED)) == IRQ_PENDING);
desc->status &= ~IRQ_INPROGRESS;
out_unlock:
- spin_unlock(&desc->lock);
+ raw_spin_unlock(&desc->lock);
}
/**
- * handle_percpu_IRQ - Per CPU local irq handler
+ * handle_percpu_irq - Per CPU local irq handler
* @irq: the interrupt number
* @desc: the interrupt description structure for this irq
*
@@ -643,7 +677,7 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
}
chip_bus_lock(irq, desc);
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
/* Uninstall? */
if (handle == handle_bad_irq) {
@@ -661,7 +695,7 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
desc->depth = 0;
desc->chip->startup(irq);
}
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
chip_bus_sync_unlock(irq, desc);
}
EXPORT_SYMBOL_GPL(__set_irq_handler);
@@ -692,9 +726,9 @@ void __init set_irq_noprobe(unsigned int irq)
return;
}
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->status |= IRQ_NOPROBE;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
}
void __init set_irq_probe(unsigned int irq)
@@ -707,7 +741,7 @@ void __init set_irq_probe(unsigned int irq)
return;
}
- spin_lock_irqsave(&desc->lock, flags);
+ raw_spin_lock_irqsave(&desc->lock, flags);
desc->status &= ~IRQ_NOPROBE;
- spin_unlock_irqrestore(&desc->lock, flags);
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
}
generated by cgit v1.2.3 (git 2.46.0) at 2025-08-11 08:51:16 +0000