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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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8
include/linux/msi.h
View file

@ -1,6 +1,8 @@
#ifndef LINUX_MSI_H
#define LINUX_MSI_H
#include <linux/list.h>
struct msi_msg {
u32 address_lo; /* low 32 bits of msi message address */
u32 address_hi; /* high 32 bits of msi message address */
@ -24,10 +26,8 @@ struct msi_desc {
unsigned default_irq; /* default pre-assigned irq */
}msi_attrib;
struct {
__u16 head;
__u16 tail;
}link;
unsigned int irq;
struct list_head list;
void __iomem *mask_base;
struct pci_dev *dev;