[PULL,10/12] pc-bios/s390-ccw: Re-initialize receive queue index before each boot attempt

Commit Message

Thomas Huth Nov. 18, 2024, 5:36 p.m. UTC

Now that we can boot from multiple boot devices, we have to make sure
to reinitialize static variables like rx_last_idx to avoid that they
contain garbage data during the second boot attempt (which can lead to
crashes when the code tries to access the wrong ring data).

Message-ID: <[e-mail]>
Reviewed-by: Jared Rossi <[e-mail]>
Signed-off-by: Thomas Huth <[e-mail]>
---
 pc-bios/s390-ccw/virtio-net.c | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/pc-bios/s390-ccw/virtio-net.c b/pc-bios/s390-ccw/virtio-net.c
index f9854a22c3..578c89d0c5 100644
--- a/pc-bios/s390-ccw/virtio-net.c
+++ b/pc-bios/s390-ccw/virtio-net.c
@@ -51,6 +51,8 @@  int virtio_net_init(void *mac_addr)
     void *buf;
     int i;
 
+    rx_last_idx = 0;
+
     vdev->guest_features[0] = VIRTIO_NET_F_MAC_BIT;
     virtio_setup_ccw(vdev);