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virtio_ring: fix description of virtqueue_get_buf

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The device (not the driver) populates the used ring and includes the len
of how much data was written.

Signed-off-by: Felipe Franciosi <felipe@nutanix.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Felipe Franciosi 2016-11-14 06:16:15 -08:00 committed by Michael S. Tsirkin
parent b9fd06d0da
commit 0c7eaf5930
1 changed files with 1 additions and 1 deletions
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drivers/virtio/virtio_ring.c
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@ -649,7 +649,7 @@ static inline bool more_used(const struct vring_virtqueue *vq)
* @vq: the struct virtqueue we're talking about. * @vq: the struct virtqueue we're talking about.
* @len: the length written into the buffer * @len: the length written into the buffer
* *
* If the driver wrote data into the buffer, @len will be set to the * If the device wrote data into the buffer, @len will be set to the
* amount written. This means you don't need to clear the buffer * amount written. This means you don't need to clear the buffer
* beforehand to ensure there's no data leakage in the case of short * beforehand to ensure there's no data leakage in the case of short
* writes. * writes.