Commit e17ab35f authored Feb 16, 2011 by Konrad Rzeszutek Wilk

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>

parent a0b2fa8e

drivers/xen/xen-pciback/pciback_ops.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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,