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-rw-r--r--src/vnet/devices/virtio/pci.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/src/vnet/devices/virtio/pci.c b/src/vnet/devices/virtio/pci.c
index e615827ccd4..0ff453eb204 100644
--- a/src/vnet/devices/virtio/pci.c
+++ b/src/vnet/devices/virtio/pci.c
@@ -586,7 +586,7 @@ virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif)
clib_error_t *error = 0;
virtio_main_t *vim = &virtio_main;
struct virtio_pci_cap cap;
- u8 pos, common_cfg = 0, notify_base = 0, dev_cfg = 0, isr = 0;
+ u8 pos, common_cfg = 0, notify_base = 0, dev_cfg = 0, isr = 0, pci_cfg = 0;
vlib_pci_dev_handle_t h = vif->pci_dev_handle;
if ((error = vlib_pci_read_config_u8 (vm, h, PCI_CAPABILITY_LIST, &pos)))
@@ -637,18 +637,25 @@ virtio_pci_read_caps (vlib_main_t * vm, virtio_if_t * vif)
case VIRTIO_PCI_CAP_ISR_CFG:
isr = 1;
break;
+ case VIRTIO_PCI_CAP_PCI_CFG:
+ if (cap.bar == 0)
+ pci_cfg = 1;
+ break;
}
next:
pos = cap.cap_next;
}
+ if (!pci_cfg)
+ clib_error_return (error, "modern virtio pci device found");
+
if (common_cfg == 0 || notify_base == 0 || dev_cfg == 0 || isr == 0)
{
virtio_log_debug (vim, vif, "legacy virtio pci device found");
return error;
}
- virtio_log_debug (vim, vif, "modern virtio pci device found");
+ virtio_log_debug (vim, vif, "transitional virtio pci device found");
return error;
}
@@ -659,7 +666,8 @@ virtio_pci_device_init (vlib_main_t * vm, virtio_if_t * vif,
clib_error_t *error = 0;
u8 status = 0;
- virtio_pci_read_caps (vm, vif);
+ if ((error = virtio_pci_read_caps (vm, vif)))
+ clib_error_return (error, "Device not supported");
if (virtio_pci_reset_device (vm, vif) < 0)
clib_error_return (error, "Failed to reset the device");