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xen/irq: If we fail during msi_capability_init return proper error code.

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There are three different modes: PV, HVM, and initial domain 0. In all
the cases we would return -1 for failure instead of a proper error code.
Fix this by propagating the error code from the generic IRQ code.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2011-09-29 13:26:45 -04:00
parent 9bb9efe4ba
commit e6599225db
2 changed files with 11 additions and 6 deletions
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10
arch/x86/pci/xen.c
View file

@ -175,8 +175,10 @@ static int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
"pcifront-msi-x" :
"pcifront-msi",
DOMID_SELF);
if (irq < 0)
if (irq < 0) {
ret = irq;
goto free;
}
i++;
}
kfree(v);
@ -221,8 +223,10 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
if (msg.data != XEN_PIRQ_MSI_DATA ||
xen_irq_from_pirq(pirq) < 0) {
pirq = xen_allocate_pirq_msi(dev, msidesc);
if (pirq < 0)
if (pirq < 0) {
irq = -ENODEV;
goto error;
}
xen_msi_compose_msg(dev, pirq, &msg);
__write_msi_msg(msidesc, &msg);
dev_dbg(&dev->dev, "xen: msi bound to pirq=%d\n", pirq);
@ -244,7 +248,7 @@ static int xen_hvm_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
error:
dev_err(&dev->dev,
"Xen PCI frontend has not registered MSI/MSI-X support!\n");
return -ENODEV;
return irq;
}
#ifdef CONFIG_XEN_DOM0

7
drivers/xen/events.c
View file

@ -432,7 +432,8 @@ static int __must_check xen_allocate_irq_dynamic(void)
irq = irq_alloc_desc_from(first, -1);
xen_irq_init(irq);
if (irq >= 0)
xen_irq_init(irq);
return irq;
}
@ -713,7 +714,7 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
mutex_lock(&irq_mapping_update_lock);
irq = xen_allocate_irq_dynamic();
if (irq == -1)
if (irq < 0)
goto out;
irq_set_chip_and_handler_name(irq, &xen_pirq_chip, handle_edge_irq,
@ -729,7 +730,7 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
error_irq:
mutex_unlock(&irq_mapping_update_lock);
xen_free_irq(irq);
return -1;
return ret;
}
#endif