From bdbe1e038883ee944b59586a47d5dcdecba86070 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Sun, 14 Aug 2011 17:52:32 +0300 Subject: [PATCH] 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 Cc: "Michael S. Tsirkin" Cc: Rusty Russell Cc: virtualization@lists.linux-foundation.org Signed-off-by: Sasha Levin Signed-off-by: Rusty Russell --- include/linux/virtio_config.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 39c88c5ad19d..add4790b21fe 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -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, -- 2.39.5