diff options
Diffstat (limited to 'drivers/xen/xen-pciback/conf_space_header.c')
| -rw-r--r-- | drivers/xen/xen-pciback/conf_space_header.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/xen/xen-pciback/conf_space_header.c b/drivers/xen/xen-pciback/conf_space_header.c index 10ae24b5a76e..fb4fccb4aecc 100644 --- a/drivers/xen/xen-pciback/conf_space_header.c +++ b/drivers/xen/xen-pciback/conf_space_header.c @@ -117,6 +117,25 @@ static int command_write(struct pci_dev *dev, int offset, u16 value, void *data) pci_clear_mwi(dev); } + if (dev_data && dev_data->allow_interrupt_control) { + if ((cmd->val ^ value) & PCI_COMMAND_INTX_DISABLE) { + if (value & PCI_COMMAND_INTX_DISABLE) { + pci_intx(dev, 0); + } else { + /* Do not allow enabling INTx together with MSI or MSI-X. */ + switch (xen_pcibk_get_interrupt_type(dev)) { + case INTERRUPT_TYPE_NONE: + pci_intx(dev, 1); + break; + case INTERRUPT_TYPE_INTX: + break; + default: + return PCIBIOS_SET_FAILED; + } + } + } + } + cmd->val = value; if (!xen_pcibk_permissive && (!dev_data || !dev_data->permissive)) |