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s390-ccw.img: Fix sporadic reboot hangs: Initialize next_idx

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The current code does not initialize next_idx in the virtio ring.
As the ccw bios will always use guest memory at a fixed location,
this queue might != 0 after a reboot.
Lets make the initialization explicit.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2014-02-12 16:17:35 +01:00
parent c804c2a717
commit d1028f1b5b
1 changed files with 1 additions and 0 deletions
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pc-bios/s390-ccw/virtio.c
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@ -124,6 +124,7 @@ static void vring_init(struct vring *vr, unsigned int num, void *p,
vr->used->flags = VRING_USED_F_NO_NOTIFY;
vr->used->idx = 0;
vr->used_idx = 0;
vr->next_idx = 0;
debug_print_addr("init vr", vr);
}