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s390-ccw.img: Fix compile warning in s390 ccw virtio code 

Lets fix this gcc warning:

virtio.c: In function ‘vring_send_buf’:
virtio.c:125:35: error: operation on ‘vr->next_idx’ may be undefined
[-Werror=sequence-point]

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Christian Borntraeger 2013-04-23 01:23:04 +00:00 committed by Alexander Graf
parent 6328801f19
commit dc03640b58
1 changed files with 3 additions and 1 deletions
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4
pc-bios/s390-ccw/virtio.c
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@ -122,7 +122,9 @@ static void vring_send_buf(struct vring *vr, void *p, int len, int flags)
vr->desc[vr->next_idx].addr = (ulong)p;
vr->desc[vr->next_idx].len = len;
vr->desc[vr->next_idx].flags = flags & ~VRING_HIDDEN_IS_CHAIN;
vr->desc[vr->next_idx].next = ++vr->next_idx;
vr->desc[vr->next_idx].next = vr->next_idx;
vr->desc[vr->next_idx].next++;
vr->next_idx++;
/* Chains only have a single ID */
if (!(flags & VRING_DESC_F_NEXT)) {