lguest: remove invalid interrupt forcing logic.

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2088761152 (lguest: notify on empty) introduced
lguest support for the VIRTIO_F_NOTIFY_ON_EMPTY flag, but in fact it turned on
interrupts all the time.

Because we always process one buffer at a time, the inflight count is always 0
when call trigger_irq and so we always ignore VRING_AVAIL_F_NO_INTERRUPT from
the Guest.

It should be looking to see if there are more buffers in the Guest's queue:
if it's empty, then we force an interrupt.

This makes little difference, since we usually have an empty queue; but
that's the subject of another patch.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

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Rusty Russell 2009-06-12 22:27:01 -06:00

parent a6c372de6e

commit ebf9a5a99c

1 changed files with 1 additions and 7 deletions

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Documentation/lguest/lguest.c

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