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df55531b8b
This is essentially a revert of the commita7588c896b("ALSA: timer: Check ack_list emptiness instead of bit flag"). The intended change by the commit turns out to be insufficient, as snd_timer_close*() always calls snd_timer_stop() that deletes the ack_list beforehand. In theory, we can change the behavior of snd_timer_stop() to sync the pending ack_list, but this will become a deadlock for the callback like sequencer that calls again snd_timer_stop() from itself. So, reverting the change is a more straightforward solution. Fixes:a7588c896b("ALSA: timer: Check ack_list emptiness instead of bit flag") Reported-by: syzbot+58813d77154713f4de15@syzkaller.appspotmail.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.