Stefan Richter 424d66ceda
firewire: nosy: fix device shutdown with active client ...
Fix race between nosy_open() and remove_card() by replacing the
unprotected array of card pointers by a mutex-protected list of cards.
Make card instances reference-counted and let each client hold a
reference.
Notify clients about card removal via POLLHUP in poll()'s events
bitmap; also let read() fail with errno=ENODEV if the card was removed
and everything in the buffer was read.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de >
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424d66ceda