Takashi Iwai 2a845837e3 ALSA: hda/realtek: Fix deadlock by COEF mutex
The recently introduced coef_mutex for Realtek codec seems causing a
deadlock when the relevant code is invoked from the power-off state;
then the HD-audio core tries to power-up internally, and this kicks
off the codec runtime PM code that tries to take the same coef_mutex.

In order to avoid the deadlock, do the temporary power up/down around
the coef_mutex acquisition and release.  This assures that the
power-up sequence runs before the mutex, hence no re-entrance will
happen.

Fixes: b837a9f5ab3b ("ALSA: hda: realtek: Fix race at concurrent COEF updates")
Reported-and-tested-by: Julian Wollrath <jwollrath@web.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220214132838.4db10fca@schienar
Link: https://lore.kernel.org/r/20220214130410.21230-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2022-02-14 14:04:48 +01:00
2022-01-23 06:20:44 +02:00
2022-01-23 06:20:44 +02:00
2022-02-01 16:52:54 +01:00
2022-01-23 06:20:44 +02:00
2022-02-01 16:52:54 +01:00
2022-01-22 08:33:37 +02:00
2022-01-23 06:20:44 +02:00
2022-01-23 06:20:44 +02:00
2022-01-23 06:20:44 +02:00
2022-01-11 14:26:55 -08:00
2022-01-22 09:40:01 +02:00
2022-01-16 16:15:14 +02:00
2022-01-23 06:20:44 +02:00
2022-01-23 10:12:53 +02:00

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.
Description
No description provided
Readme 5.7 GiB
Languages
C 97.6%
Assembly 1%
Shell 0.5%
Python 0.3%
Makefile 0.3%