f5e829f92a
This patch adds a new feature to enable the validation of input data to control elements in the ALSA core side. When CONFIG_SND_CTL_INPUT_VALIDATION is set, ALSA core verifies whether the each input value via control API is in the defined ranges, also checks whether it's aligned to the defined steps. If an invalid value is detected, ALSA core returns -EINVAL error immediately without passing further to the driver's callback. So this is a kind of hardening for (badly written) drivers that have no proper error checks, at the cost of a slight performance overhead. Technically seen, this reuses a part of the existing validation code for CONFIG_SND_CTL_DEBUG case with a slight modification to suppress error prints for the input validation. Link: https://lore.kernel.org/r/20220609120219.3937-5-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| 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 | ||
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.