[PATCH 1/2] xen: fix the error handling of msi setup

[Qing He <qing.he@intel.com>]

Fix the error handling of msi setup, the return value of failure
is -1, not 0.

Signed-off-by: Qing He <qing.he@intel.com>

---
 arch/x86/xen/pci.c   |    5 ++---
 drivers/xen/events.c |    4 ++--
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/arch/x86/xen/pci.c b/arch/x86/xen/pci.c
index 60bab67..44d91ad 100644
--- a/arch/x86/xen/pci.c
+++ b/arch/x86/xen/pci.c
@@ -90,13 +90,12 @@ void __init xen_setup_pirqs(void)
 #ifdef CONFIG_PCI_MSI
 int xen_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
-	unsigned int irq;
-	int ret;
+	int irq, ret;
 	struct msi_desc *msidesc;
 
 	list_for_each_entry(msidesc, &dev->msi_list, list) {
 		irq = xen_create_msi_irq(dev, msidesc, type);
-		if (irq == 0)
+		if (irq < 0)
 			return -1;
 
 		ret = set_irq_msi(irq, msidesc);
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 007b1d7..a3d430b 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -591,7 +591,7 @@ int xen_destroy_irq(int irq)
 	unmap_irq.domid = DOMID_SELF;
 	rc = HYPERVISOR_physdev_op(PHYSDEVOP_unmap_pirq, &unmap_irq);
 	if (rc) {
-		printk(KERN_WARNING "unmap irq failed %x\n", rc);
+		printk(KERN_WARNING "unmap irq failed %d\n", rc);
 		goto out;
 	}
 
@@ -643,7 +643,7 @@ int xen_create_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, int type)
 	rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
 	if (rc) {
 
-		printk(KERN_WARNING "xen map irq failed %x\n", rc);
+		printk(KERN_WARNING "xen map irq failed %d\n", rc);
 
 		dynamic_irq_cleanup(irq);