On Fri, 29 Nov 2002, Takashi Iwai wrote:
> Hi,
>
> the attached is my latest patch.
> could you check it?
Let's go and make things more complicated (like in my tree on disc):
1) waiting for time when all disconnected applications have closed
all file descriptors is a bit problem, because no new/other USB devices
can be connected/disconnected; in my tree, I use thread to postpone
freeing of snd_card_t structure
2) replace file->f_op with fake operations which allows only original
release() callback in snd_card_disconnect(); this point makes things
more and more simple than your code (check all accesses), because we
need to count only open/release calls
3) the unfinished problem is still: how to behave, if the disconnect event
comes in the middle of some code; you're right at this point, the
lowlevel driver must handle it
Please, remove from your code any checks from ioctl(), poll(), read() /
write(). Then commit and I'll merge my tree with yours.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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