Re: [alsa-devel] out of sync capture samples with MMAP on MIPS

On 05/25/2018 02:20 PM, Takashi Iwai wrote:> It's likely because of the cache coherency issue on ARM.

Currently USB-audio driver uses the buffer via vmalloc() for the intermediate buffer, and this may go out of sync on non-coherent arch like ARM.

Does the patch below help? Not sure whether it works on ARM at all, as I've tested only on x86. Your patch works. I cannot reproduce the issue anymore. Thanks.