seanb 13d47e9c25 Consistently establish / disestablish shutdown hook
in the bus layer and remove from common ath_attach().
Having it in both layers (on some bus architectures)
was causing a double call to ath_stop() on shutdown
which in turn was tickling the bus lockup described
therin on slower machines.
2006-07-14 13:37:25 +00:00
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