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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-09-23 22:26:31 -0600 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2009-09-23 22:26:31 +0930 |
| commit | 3c1b27d5043086a485f8526353ae9fe37bfa1065 (patch) | |
| tree | e3b6eda3c66bcd1fc3af6e7fa6e4e3af77459474 /include/linux/virtio.h | |
| parent | f68d24082e22ccee3077d11aeb6dc5354f0ca7f1 (diff) | |
| download | linux-3c1b27d5043086a485f8526353ae9fe37bfa1065.tar.gz linux-3c1b27d5043086a485f8526353ae9fe37bfa1065.tar.bz2 linux-3c1b27d5043086a485f8526353ae9fe37bfa1065.zip | |
virtio: make add_buf return capacity remaining
This API change means that virtio_net can tell how much capacity
remains for buffers. It's necessarily fuzzy, since
VIRTIO_RING_F_INDIRECT_DESC means we can fit any number of descriptors
in one, *if* we can kmalloc.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Dinesh Subhraveti <dineshs@us.ibm.com>
Diffstat (limited to 'include/linux/virtio.h')
| -rw-r--r-- | include/linux/virtio.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index 4fca4f5440ba..057a2e010758 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -34,7 +34,7 @@ struct virtqueue { * out_num: the number of sg readable by other side * in_num: the number of sg which are writable (after readable ones) * data: the token identifying the buffer. - * Returns 0 or an error. + * Returns remaining capacity of queue (sg segments) or a negative error. * @kick: update after add_buf * vq: the struct virtqueue * After one or more add_buf calls, invoke this to kick the other side. |