msi: Kill the msi_desc array.
We need to be able to get from an irq number to a struct msi_desc.
The msi_desc array in msi.c had several short comings the big one was
that it could not be used outside of msi.c. Using irq_data in struct
irq_desc almost worked except on some architectures irq_data needs to
be used for something else.
So this patch adds a msi_desc pointer to irq_desc, adds the appropriate
wrappers and changes all of the msi code to use them.
The dynamic_irq_init/cleanup code was tweaked to ensure the new
field is left in a well defined state.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 52fc405..5504b67 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -68,6 +68,7 @@
#define IRQ_MOVE_PENDING 0x40000000 /* need to re-target IRQ destination */
struct proc_dir_entry;
+struct msi_desc;
/**
* struct irq_chip - hardware interrupt chip descriptor
@@ -148,6 +149,7 @@
struct irq_desc {
irq_flow_handler_t handle_irq;
struct irq_chip *chip;
+ struct msi_desc *msi_desc;
void *handler_data;
void *chip_data;
struct irqaction *action; /* IRQ action list */
@@ -373,10 +375,12 @@
extern int set_irq_data(unsigned int irq, void *data);
extern int set_irq_chip_data(unsigned int irq, void *data);
extern int set_irq_type(unsigned int irq, unsigned int type);
+extern int set_irq_msi(unsigned int irq, struct msi_desc *entry);
#define get_irq_chip(irq) (irq_desc[irq].chip)
#define get_irq_chip_data(irq) (irq_desc[irq].chip_data)
#define get_irq_data(irq) (irq_desc[irq].handler_data)
+#define get_irq_msi(irq) (irq_desc[irq].msi_desc)
#endif /* CONFIG_GENERIC_HARDIRQS */