Linux mainline fork with MSM8998 patches | https://mainline.space | Currently supported devices:
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e8712315c4
component has io_mutex, but it had been used at
snd_soc_component_update_bits_legacy() only which does read and write.
static int snd_soc_component_update_bits_legacy(...)
{
...
=> mutex_lock(&component->io_mutex);
...
old = snd_soc_component_read(...);
...
ret = snd_soc_component_write(...);
...
=> mutex_unlock(&component->io_mutex);
...
}
It is pointless if it is not used with both read and write functions.
This patch uses io_mutex correctly with read/write.
Here, xxx_no_lock() is local functions.
static int snd_soc_component_read(...)
{
...
=> mutex_lock(&component->io_mutex);
val = soc_component_read_no_lock(...);
=> mutex_unlock(&component->io_mutex);
...
}
static int snd_soc_component_write(...)
{
...
=> mutex_lock(&component->io_mutex);
ret = soc_component_write_no_lock(...);
=> mutex_unlock(&component->io_mutex);
...
}
static int snd_soc_component_update_bits_legacy(...)
{
...
=> mutex_lock(&component->io_mutex);
...
old = soc_component_read_no_lock(...);
...
ret = soc_component_write_no_lock(...);
...
=> mutex_unlock(&component->io_mutex);
...
}
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87r1uf4mfa.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| 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.