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Keyon Jie e2803e610a
ASoC: SOF: PCM: add period_elapsed work to fix race condition in interrupt context
The IPC implementation in SOF requires sending IPCs serially: we should
not send a new IPC command to the firmware before we get an ACK (or time
out) from firmware, and the IRQ processing is complete.

snd_pcm_period_elapsed() can be called in interrupt context before
IRQ_HANDLED is returned. When the PCM is done draining, a STOP
IPC will then be sent, which breaks the expectation that IPCs are
handled serially and leads to IPC timeouts.

This patch adds a workqueue to defer the call to snd_pcm_elapsed() after
the IRQ is handled.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-05-03 14:59:11 +09:00
arch
block
certs
crypto
Documentation ASoC: fsl_audmix: remove "model" attribute from DT document 2019-05-02 10:46:15 +09:00
drivers ACPI / utils: Remove deprecated function since no user left 2019-04-01 11:00:16 +02:00
fs
include ASoC: SOF: Add xtensa support 2019-04-28 02:49:31 +09:00
init
ipc
kernel
lib
LICENSES
mm
net
samples
scripts
security
sound ASoC: SOF: PCM: add period_elapsed work to fix race condition in interrupt context 2019-05-03 14:59:11 +09:00
tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge branch 'acpi-utils' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm into asoc-5.2 2019-04-02 16:20:47 +07:00
Makefile
README

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.