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| author | Eric W. Biederman <ebiederm@xmission.com> | 2007-01-28 12:52:03 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-02-07 15:50:08 -0800 |
| commit | 5b912c108c8b1fcecbfe13d6d9a183db97b682d3 (patch) | |
| tree | 0267f65fd9237a41207e4359e09d09e60f6cd754 /kernel/irq | |
| parent | 1c659d61cfbd8dc3926688c1bbf12d80f4cfb5c2 (diff) | |
| download | linux-5b912c108c8b1fcecbfe13d6d9a183db97b682d3.tar.gz linux-5b912c108c8b1fcecbfe13d6d9a183db97b682d3.tar.bz2 linux-5b912c108c8b1fcecbfe13d6d9a183db97b682d3.zip | |
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>
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/chip.c | 28 |
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 |