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H A Dvirtio_net.cdiff 0aea51c37fc5868cd723f670af9056c2ef694fee Wed Aug 26 04:28:28 CDT 2009 Amit Shah <amit.shah@redhat.com> virtio_net: Check for room in the vq before adding buffer

Saves us one cycle of alloc-add-free if the queue was full.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (modified)