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MSI: Use a list instead of the custom link structure

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The msi descriptors are linked together with what looks a lot like
a linked list, but isn't a struct list_head list. Make it one.

The only complication is that previously we walked a list of irqs, and
got the descriptor for each with get_irq_msi(). Now we have a list of
descriptors and need to get the irq out of it, so it needs to be in the
actual struct msi_desc. We use 0 to indicate no irq is setup.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Michael Ellerman 2007-04-05 17:19:10 +10:00 • committed by Greg Kroah-Hartman
parent bab41e9be7
commit 4aa9bc955d
5 changed files with 33 additions and 46 deletions
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1
include/linux/pci.h
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@ -190,6 +190,7 @@ struct pci_dev {
struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
#ifdef CONFIG_PCI_MSI
unsigned int first_msi_irq;
struct list_head msi_list;
#endif
};