[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] linux-2.6.18/pciback: disable MSI/MSI-X when resetting device
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> In cases where the guest is abruptly killed and has not disabled MSI/MSI-X interrupts we want to do that. 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: Jan Beulich <jbeulich@xxxxxxxxxx> --- a/drivers/xen/pciback/pciback_ops.c +++ b/drivers/xen/pciback/pciback_ops.c @@ -22,6 +22,14 @@ void pciback_reset_device(struct pci_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); Attachment:
xen-pciback-reset-msi.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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