Commit 3ead6f4d authored Aug 14, 2011 by Sasha Levin Committed by Rusty Russell Nov 02, 2011

virtio_config: Add virtio_config_val_len()

This patch adds virtio_config_val_len() which allows retrieving variable
length data from the virtio config space only if a specific feature is on.

Cc: Amit Shah <amit.shah@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

parent 51c6d61a

include/linux/virtio_config.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -155,6 +155,9 @@ static inline bool virtio_has_feature(const struct virtio_device *vdev,
		#define virtio_config_val(vdev, fbit, offset, v) \
		virtio_config_buf((vdev), (fbit), (offset), (v), sizeof(*v))

		#define virtio_config_val_len(vdev, fbit, offset, v, len) \
		virtio_config_buf((vdev), (fbit), (offset), (v), (len))

		static inline int virtio_config_buf(struct virtio_device *vdev,
		unsigned int fbit,
		unsigned int offset,

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