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Commit a2be65fd authored by Konrad Rzeszutek Wilk's avatar Konrad Rzeszutek Wilk
Browse files

xen/pciback: Disable MSI/MSI-X when reseting a device 



In cases where the guest is abruptly killed and has not disabled
MSI/MSI-X interrupts we want to do it for it.

Otherwise when the guest is started up and enables MSI, we would
get a WARN() that the device already had been enabled.

Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent fd5b221b

drivers/xen/xen-pciback/pciback_ops.c

+8 −0
Original line number Diff line number Diff line
@@ -23,6 +23,14 @@ void pciback_reset_device(struct pci_dev *dev) 


	/* Disable devices (but not bridges) */

	if (dev->hdr_type == PCI_HEADER_TYPE_NORMAL) {

#ifdef CONFIG_PCI_MSI

		/* The guest could have been abruptly killed without

		 * disabling MSI/MSI-X interrupts.*/

		if (dev->msix_enabled)

			pci_disable_msix(dev);

		if (dev->msi_enabled)

			pci_disable_msi(dev);

#endif

		pci_disable_device(dev);



		pci_write_config_word(dev, PCI_COMMAND, 0);