Fix iso_shutdown with juju firewire stack

Make iso start/stop/start sequences on the same handle, such as those used
by apps such as MythTV behave as expected. I can finally watch video off my
cable box over FireWire using MythTV w/the juju stack now. :)

Initially, seemed a one-liner might be the ticket (setting handle->iso.fd = -1
at the end of fw_iso_shutdown()), but that led to memory corruption and a
locked up system. What ultimately worked was essentially mimicking what the
old stack did to track iso state, and call fw_iso_stop() from
fw_iso_shutdown() as needed.

Nb: Only lightly tested with iso receive via MythTV, but its all fairly
straight-forward, I think.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Dan Dennedy <dan@dennedy.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/fw.h b/src/fw.h
index 5b99245..56b59d9 100644
--- a/src/fw.h
+++ b/src/fw.h
@@ -129,6 +129,7 @@ struct fw_handle {
 		int prebuffer;
 		int start_on_cycle;
 		enum raw1394_iso_dma_recv_mode recv_mode;
+		enum { ISO_STOPPED, ISO_ACTIVE } state;
 		raw1394_iso_xmit_handler_t xmit_handler;
 		raw1394_iso_recv_handler_t recv_handler;
 		unsigned char *buffer, *buffer_end, *head;