firewire: nosy: fix device shutdown with active client

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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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Stefan Richter 2010-07-22 11:56:38 +02:00

parent b6d9c125e6

commit 424d66ceda

1 changed files with 82 additions and 29 deletions

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drivers/firewire/nosy.c

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