[PATCH] ALSA: usb-audio: Increase max buffer size

[Jaroslav Kysela]

On 07. 04. 22 23:27, Takashi Iwai wrote:
> The current limit of max buffer size 1MB seems too small for modern
> devices with lots of channels and high sample rates.
> Let's make bigger, 4MB.

Reviewed-by: Jaroslav Kysela <perex at perex.cz>

Thanks,
	Jaroslav

> 
> Signed-off-by: Takashi Iwai <tiwai at suse.de>
> ---
>   sound/usb/pcm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
> index 6a460225f2e3..37ee6df8b15a 100644
> --- a/sound/usb/pcm.c
> +++ b/sound/usb/pcm.c
> @@ -659,7 +659,7 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
>   #define hwc_debug(fmt, args...) do { } while(0)
>   #endif
>   
> -#define MAX_BUFFER_BYTES	(1024 * 1024)
> +#define MAX_BUFFER_BYTES	(4 * 1024 * 1024)
>   #define MAX_PERIOD_BYTES	(512 * 1024)
>   
>   static const struct snd_pcm_hardware snd_usb_hardware =


-- 
Jaroslav Kysela <perex at perex.cz>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.