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msi: Kill the msi_desc array.

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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>
This commit is contained in:
Eric W. Biederman
2007-01-28 12:52:03 -07:00
committed by Greg Kroah-Hartman
parent 1c659d61cf
commit 5b912c108c
4 changed files with 54 additions and 24 deletions
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2
arch/ia64/sn/kernel/msi_sn.c
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@@ -74,7 +74,7 @@ int sn_setup_msi_irq(unsigned int irq, struct pci_dev *pdev)
struct pcibus_bussoft *bussoft = SN_PCIDEV_BUSSOFT(pdev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
entry = get_irq_data(irq);
entry = get_irq_msi(irq);
if (!entry->msi_attrib.is_64)
return -EINVAL;