[Qemu-devel] [PATCH v2] tests: fix qvirtqueue_kick

[Laurent Vivier]

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.

Signed-off-by: Laurent Vivier <address@hidden>
---
v2: vq->avail->ring[] is also a 16bit value

 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);
-- 
2.5.5