On Fri, Jun 14, 2024 at 02:47:25PM +0200, Takashi Iwai wrote:
Although we have already a mechanism for sanity checks of input values for control writes, it's not applied unless the kconfig CONFIG_SND_CTL_INPUT_VALIDATION is set due to the performance reason. Nevertheless, it still makes sense to apply the check for user elements despite of its cost, as that's the only way to filter out the invalid values; the user controls are handled solely in ALSA core code, and there is no corresponding driver, after all.
This patch enables the input value validation for user control elements no matter whether CONFIG_SND_CTL_INPUT_VALIDATION is set or not. The kselftest will be happier with this change, as the incorrect values will be bailed out now with errors.
Reviewed-by: Mark Brown broonie@kernel.org