On Tue, 29 May 2018 09:55:44 +0200, Daniel Danzberger wrote: > > On 05/27/2018 01:08 PM, Takashi Iwai wrote: > > On Sun, 27 May 2018 11:34:07 +0200, > > Daniel Danzberger wrote: > >> > >> 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. > > > > Good to hear. Below is the revised version, so that the behavior can > > be controlled via use_vmalloc option for snd-usb-audio module. > > Could you check whether this still works? > > it works. OK, I'll queue the patch for 4.18. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
