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authorEric W. Biederman <ebiederm@xmission.com>2007-01-28 12:56:37 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-02-07 15:50:08 -0800
commitf7feaca77d6ad6bcfcc88ac54e3188970448d6fe (patch)
tree3002076ed2b6ab497b3b90232ff11b08de2eca5d /arch/ia64/kernel
parent5b912c108c8b1fcecbfe13d6d9a183db97b682d3 (diff)
msi: Make MSI useable more architectures
The arch hooks arch_setup_msi_irq and arch_teardown_msi_irq are now responsible for allocating and freeing the linux irq in addition to setting up the the linux irq to work with the interrupt. arch_setup_msi_irq now takes a pci_device and a msi_desc and returns an irq. With this change in place this code should be useable by all platforms except those that won't let the OS touch the hardware like ppc RTAS. 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 'arch/ia64/kernel')
-rw-r--r--arch/ia64/kernel/msi_ia64.c19
1 files changed, 12 insertions, 7 deletions
diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c
index 822e59a1b82..0d05450c91c 100644
--- a/arch/ia64/kernel/msi_ia64.c
+++ b/arch/ia64/kernel/msi_ia64.c
@@ -64,12 +64,17 @@ static void ia64_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
}
#endif /* CONFIG_SMP */
-int ia64_setup_msi_irq(unsigned int irq, struct pci_dev *pdev)
+int ia64_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
{
struct msi_msg msg;
unsigned long dest_phys_id;
- unsigned int vector;
+ unsigned int irq, vector;
+ irq = create_irq();
+ if (irq < 0)
+ return irq;
+
+ set_irq_msi(irq, desc);
dest_phys_id = cpu_physical_id(first_cpu(cpu_online_map));
vector = irq;
@@ -89,12 +94,12 @@ int ia64_setup_msi_irq(unsigned int irq, struct pci_dev *pdev)
write_msi_msg(irq, &msg);
set_irq_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq);
- return 0;
+ return irq;
}
void ia64_teardown_msi_irq(unsigned int irq)
{
- return; /* no-op */
+ destroy_irq(irq);
}
static void ia64_ack_msi_irq(unsigned int irq)
@@ -126,12 +131,12 @@ static struct irq_chip ia64_msi_chip = {
};
-int arch_setup_msi_irq(unsigned int irq, struct pci_dev *pdev)
+int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
{
if (platform_setup_msi_irq)
- return platform_setup_msi_irq(irq, pdev);
+ return platform_setup_msi_irq(pdev, desc);
- return ia64_setup_msi_irq(irq, pdev);
+ return ia64_setup_msi_irq(pdev, desc);
}
void arch_teardown_msi_irq(unsigned int irq)