From: Rusty Russell <rusty@rustcorp.com.au>
Date: Thu, 24 Sep 2009 04:26:31 +0000 (-0600)
Subject: virtio: make add_buf return capacity remaining
X-Git-Tag: v2.6.32-rc1~175^2~8
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3c1b27d5043086a485f8526353ae9fe37bfa1065;p=pandora-kernel.git

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>
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