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xen: events: refactor xen_create_msi_irq slightly 

Calling PHYSDEVOP_map_pirq earlier simplifies error handling and
starts to make the tail end of this function look like
xen_bind_pirq_msi_to_irq.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Ian Campbell 2011-02-18 16:43:33 +00:00 committed by Konrad Rzeszutek Wilk
parent bf480d952b
commit 8135591e90
1 changed files with 6 additions and 9 deletions
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15
drivers/xen/events.c
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@ -716,6 +716,12 @@ int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type)
map_irq.entry_nr = msidesc->msi_attrib.entry_nr;
}
rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
if (rc) {
dev_warn(&dev->dev, "xen map irq failed %d\n", rc);
goto out;
}
spin_lock(&irq_mapping_update_lock);
irq = xen_allocate_irq_dynamic();
@ -723,15 +729,6 @@ int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type)
if (irq == -1)
goto out;
rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
if (rc) {
printk(KERN_WARNING "xen map irq failed %d\n", rc);
xen_free_irq(irq);
irq = -1;
goto out;
}
irq_info[irq] = mk_pirq_info(0, map_irq.pirq, 0, map_irq.index);
set_irq_chip_and_handler_name(irq, &xen_pirq_chip,