tree e3b6eda3c66bcd1fc3af6e7fa6e4e3af77459474
parent f68d24082e22ccee3077d11aeb6dc5354f0ca7f1
author Rusty Russell <rusty@rustcorp.com.au> 1253766391 -0600
committer Rusty Russell <rusty@rustcorp.com.au> 1253710591 +0930

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>