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authorKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-02-16 15:43:25 -0500
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2011-07-19 20:58:34 -0400
commite17ab35f05cb8b3d19c70454a41ea67207caf484 (patch)
tree36c82312a06223afa4a1ce6afc9d1f92f3aaa547 /drivers/xen/xen-pciback
parenta0b2fa8ef8fee0493f6c1e2ac08b9e50a629a7c2 (diff)
xen/pciback: Don't setup an fake IRQ handler for SR-IOV devices.
If we try to setup an fake IRQ handler for legacy interrupts for devices that only have MSI-X (most if not all SR-IOV cards), we will fail with this: pciback[0000:01:10.0]: failed to install fake IRQ handler for IRQ 0! (rc:-38) Since those cards don't have anything in dev->irq. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/xen-pciback')
-rw-r--r--drivers/xen/xen-pciback/pciback_ops.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/xen/xen-pciback/pciback_ops.c b/drivers/xen/xen-pciback/pciback_ops.c
index 6c398fde7a8..28a2a558483 100644
--- a/drivers/xen/xen-pciback/pciback_ops.c
+++ b/drivers/xen/xen-pciback/pciback_ops.c
@@ -48,6 +48,13 @@ void pciback_control_isr(struct pci_dev *dev, int reset)
if (enable)
dev_data->irq = dev->irq;
+ /*
+ * SR-IOV devices in all use MSI-X and have no legacy
+ * interrupts, so inhibit creating a fake IRQ handler for them.
+ */
+ if (dev_data->irq == 0)
+ goto out;
+
dev_dbg(&dev->dev, "%s: #%d %s %s%s %s-> %s\n",
dev_data->irq_name,
dev_data->irq,