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-rw-r--r--pc-bios/s390-ccw/virtio.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index 5b9e1dc107..f438af15aa 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -114,8 +114,13 @@ static void vring_init(struct vring *vr, unsigned int num, void *p,
vr->used = (void *)(((unsigned long)&vr->avail->ring[num] + align-1)
& ~(align - 1));
+ /* Zero out all relevant field */
+ vr->avail->flags = 0;
+ vr->avail->idx = 0;
+
/* We're running with interrupts off anyways, so don't bother */
vr->used->flags = VRING_USED_F_NO_NOTIFY;
+ vr->used->idx = 0;
debug_print_addr("init vr", vr);
}