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-rw-r--r--kernel/irq/chip.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index d27b25855743..475e8a71bcdc 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -39,6 +39,7 @@ void dynamic_irq_init(unsigned int irq)
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;
desc->action = NULL;
@@ -74,6 +75,9 @@ void dynamic_irq_cleanup(unsigned int irq)
WARN_ON(1);
return;
}
+ desc->msi_desc = NULL;
+ desc->handler_data = NULL;
+ desc->chip_data = NULL;
desc->handle_irq = handle_bad_irq;
desc->chip = &no_irq_chip;
spin_unlock_irqrestore(&desc->lock, flags);
@@ -162,6 +166,30 @@ int set_irq_data(unsigned int irq, void *data)
EXPORT_SYMBOL(set_irq_data);
/**
+ * set_irq_data - set irq type data for an irq
+ * @irq: Interrupt number
+ * @data: Pointer to interrupt specific data
+ *
+ * Set the hardware irq controller data for an irq
+ */
+int set_irq_msi(unsigned int irq, struct msi_desc *entry)
+{
+ struct irq_desc *desc;
+ unsigned long flags;
+
+ if (irq >= NR_IRQS) {
+ printk(KERN_ERR
+ "Trying to install msi data for IRQ%d\n", irq);
+ return -EINVAL;
+ }
+ desc = irq_desc + irq;
+ spin_lock_irqsave(&desc->lock, flags);
+ desc->msi_desc = entry;
+ spin_unlock_irqrestore(&desc->lock, flags);
+ return 0;
+}
+
+/**
* set_irq_chip_data - set irq chip data for an irq
* @irq: Interrupt number
* @data: Pointer to chip specific data