[PATCH v3 28/38] virtio_config: add virtio_cread_le_feature
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2020-08-05 19:28:40
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Subsystem:
the rest, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Mirrors virtio_cread_feature but for LE fields. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- include/linux/virtio_config.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 5b5196fec899..cc7a2b1fd7b2 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h@@ -555,4 +555,14 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +/* Conditional config space accessors. */ +#define virtio_cread_le_feature(vdev, fbit, structname, member, ptr) \ + ({ \ + int _r = 0; \ + if (!virtio_has_feature(vdev, fbit)) \ + _r = -ENOENT; \ + else \ + virtio_cread_le((vdev), structname, member, ptr); \ + _r; \ + }) #endif /* _LINUX_VIRTIO_CONFIG_H */
--
MST
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