tests: fix qvirtqueue_kick

Commit Message

Laurent Vivier Aug. 27, 2016, 2:11 p.m. UTC

vq->avail is a 16bit value, so read and write it 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 <[e-mail]>
---
 tests/libqos/virtio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/tests/libqos/virtio.c b/tests/libqos/virtio.c
index d8c2970..25d5b97 100644
--- a/tests/libqos/virtio.c
+++ b/tests/libqos/virtio.c
@@ -257,7 +257,7 @@  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 */
@@ -266,7 +266,7 @@  void qvirtqueue_kick(const QVirtioBus *bus, QVirtioDevice *d, QVirtQueue *vq,
     /* vq->avail->ring[idx % vq->size] */
     writel(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);