pcnet: make subsystem vendor id match hardware

Real pcnet device (AT2450) apparently has subsystem
device and vendor id set to 0, this is out of spec
(which requires that vendor id is obtained from PCI SIG)
but windows xp driver seems to need this in order
to associate.

qemu sets pci subsystem id to qumranet/qemu
since d350d97d196a632b6c7493acf07a061017fc6f7d,
debian does not yet have this patch.

https://bugzilla.redhat.com/show_bug.cgi?id=521247

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/hw/pcnet.c b/hw/pcnet.c
index f88989888d8d9a0a507b2e3af5d10e6b1703ce06..5e63eb5c06c79c9226e35b678e0351d68203def0 100644 (file)
--- a/hw/pcnet.c
+++ b/hw/pcnet.c
@@ -1997,6 +1997,9 @@ static int pci_pcnet_init(PCIDevice *pci_dev)
     pci_set_long(pci_conf + PCI_BASE_ADDRESS_0 + 4,
                  PCI_BASE_ADDRESS_SPACE_MEMORY);
 
+    pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, 0x0);
+    pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, 0x0);
+
     /* TODO: value must be 0 at RST# */
     pci_conf[PCI_INTERRUPT_PIN] = 1; // interrupt pin 0
     pci_conf[PCI_MIN_GNT] = 0x06;