On Fri, Aug 26, 2016 at 11:18:22AM +0800, zhangshuai wrote: > From: Zhang Shuai <zhangshua...@huawei.com> > > The idx and ring[] of vring_avail is 16-bit, but the writel > is 32-bit, the second writel will cover the ring[free_head] > with 0. So use writew to replace writel to fix the bug. > > Signed-off-by: zhangshuai <zhangshua...@huawei.com> > --- > tests/libqos/virtio.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/tests/libqos/virtio.c b/tests/libqos/virtio.c > index d8c2970..801690f 100644 > --- a/tests/libqos/virtio.c > +++ b/tests/libqos/virtio.c > @@ -264,9 +264,9 @@ void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice > *d, QVirtQueue *vq, > uint16_t avail_event; > > /* vq->avail->ring[idx % vq->size] */ > - writel(vq->avail + 4 + (2 * (idx % vq->size)), free_head); > + writew(vq->avail + 4 + (2 * (idx % vq->size)), free_head); > /* vq->avail->idx */ > - writel(vq->avail + 2, idx + 1); > + writew(vq->avail + 2, idx + 1);
Laurent Vivier sent an equivalent patch that also covers the incorrect readl() call. I have applied his patch instead and mentioned your work to give you credit. Stefan
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