[Qemu-devel] [PULL v2 16/51] virtio-pci: call pci reset variant when guest requests reset.

[Michael S. Tsirkin]

From: Gerd Hoffmann <address@hidden>

Actually fixes linux not finding virtio 1.0 device virtqueues after
reboot.  Which is new I think, any chance linux kernel virtio code
became more strict in 4.3?

Signed-off-by: Gerd Hoffmann <address@hidden>
Reviewed-by: Michael S. Tsirkin <address@hidden>
Signed-off-by: Michael S. Tsirkin <address@hidden>
Reviewed-by: Fam Zheng <address@hidden>
Tested-by: Fam Zheng <address@hidden>
---
 hw/virtio/virtio-pci.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 440776c..0dadb66 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -47,6 +47,7 @@
 
 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
                                VirtIOPCIProxy *dev);
+static void virtio_pci_reset(DeviceState *qdev);
 
 /* virtio device */
 /* DeviceState to VirtIOPCIProxy. For use off data-path. TODO: use QOM. */
@@ -404,9 +405,7 @@ static void virtio_ioport_write(void *opaque, uint32_t 
addr, uint32_t val)
     case VIRTIO_PCI_QUEUE_PFN:
         pa = (hwaddr)val << VIRTIO_PCI_QUEUE_ADDR_SHIFT;
         if (pa == 0) {
-            virtio_pci_stop_ioeventfd(proxy);
-            virtio_reset(vdev);
-            msix_unuse_all_vectors(&proxy->pci_dev);
+            virtio_pci_reset(DEVICE(proxy));
         }
         else
             virtio_queue_set_addr(vdev, vdev->queue_sel, pa);
@@ -432,8 +431,7 @@ static void virtio_ioport_write(void *opaque, uint32_t 
addr, uint32_t val)
         }
 
         if (vdev->status == 0) {
-            virtio_reset(vdev);
-            msix_unuse_all_vectors(&proxy->pci_dev);
+            virtio_pci_reset(DEVICE(proxy));
         }
 
         /* Linux before 2.6.34 drives the device without enabling
@@ -1353,8 +1351,7 @@ static void virtio_pci_common_write(void *opaque, hwaddr 
addr,
         }
 
         if (vdev->status == 0) {
-            virtio_reset(vdev);
-            msix_unuse_all_vectors(&proxy->pci_dev);
+            virtio_pci_reset(DEVICE(proxy));
         }
 
         break;
-- 
MST