From: Laurent Vivier <lviv...@redhat.com>
vq->avail.idx and vq->avail->ring[] are a 16bit values,
so read and write them with readw()/writew() instead of
readl()/writel().
To read/write a 16bit value with a 32bit accessor works fine
on little-endian CPU but not on big endian CPU.
[An equivalent patch for the writew() calls was also sent by
Zhang Shuai <zhangshua...@huawei.com>.
--Stefan]
Signed-off-by: Laurent Vivier <lviv...@redhat.com>
Message-id: 1472330054-22607-1-git-send-email-lviv...@redhat.com
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
tests/libqos/virtio.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tests/libqos/virtio.c b/tests/libqos/virtio.c
index d8c2970..37ff860 100644
--- a/tests/libqos/virtio.c
+++ b/tests/libqos/virtio.c
@@ -257,16 +257,16 @@ void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice
*d, QVirtQueue *vq,
uint32_t free_head)
{
/* vq->avail->idx */
- uint16_t idx = readl(vq->avail + 2);
+ uint16_t idx = readw(vq->avail + 2);
/* vq->used->flags */
uint16_t flags;
/* vq->used->avail_event */
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);
/* Must read after idx is updated */
flags = readw(vq->avail);
--
2.7.4
