linux-kernel - Re: [PATCH 09/10] sound: hiface: move to use usb_control_msg

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Message-ID: <s5hblio9r8x.wl-tiwai@suse.de>
Date:   Wed, 02 Sep 2020 16:40:14 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     himadrispandya@...il.com, dvyukov@...gle.com,
        linux-usb@...r.kernel.org, perex@...ex.cz, tiwai@...e.com,
        stern@...land.harvard.ed, linux-kernel@...r.kernel.org,
        marcel@...tmann.org, johan.hedberg@...il.com,
        linux-bluetooth@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [PATCH 09/10] sound: hiface: move to use usb_control_msg_send()

On Wed, 02 Sep 2020 13:01:14 +0200,
Greg Kroah-Hartman wrote:
> 
> The usb_control_msg_send() call can return an error if a "short" write
> happens, so move the driver over to using that call instead.
> 
> Cc: Jaroslav Kysela <perex@...ex.cz>
> Cc: Takashi Iwai <tiwai@...e.com>
> Cc: alsa-devel@...a-project.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Reviewed-by: Takashi Iwai <tiwai@...e.de>


thanks,

Takashi

> ---
>  sound/usb/hiface/pcm.c | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)
> 
> diff --git a/sound/usb/hiface/pcm.c b/sound/usb/hiface/pcm.c
> index a148caa5f48e..f9c924e3964e 100644
> --- a/sound/usb/hiface/pcm.c
> +++ b/sound/usb/hiface/pcm.c
> @@ -156,16 +156,14 @@ static int hiface_pcm_set_rate(struct pcm_runtime *rt, unsigned int rate)
>  	 * This control message doesn't have any ack from the
>  	 * other side
>  	 */
> -	ret = usb_control_msg(device, usb_sndctrlpipe(device, 0),
> -			      HIFACE_SET_RATE_REQUEST,
> -			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
> -			      rate_value, 0, NULL, 0, 100);
> -	if (ret < 0) {
> +	ret = usb_control_msg_send(device, 0,
> +				   HIFACE_SET_RATE_REQUEST,
> +				   USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
> +				   rate_value, 0, NULL, 0, 100);
> +	if (ret)
>  		dev_err(&device->dev, "Error setting samplerate %d.\n", rate);
> -		return ret;
> -	}
>  
> -	return 0;
> +	return ret;
>  }
>  
>  static struct pcm_substream *hiface_pcm_get_substream(struct snd_pcm_substream
> -- 
> 2.28.0
>