linux-kernel - Re: [PATCH 02/15] usb: serial: belkin_sa: use usb_control_msg

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Message-ID: <X8n+uO2nYzRcxaLk@localhost>
Date:   Fri, 4 Dec 2020 10:17:44 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Himadri Pandya <himadrispandya@...il.com>
Cc:     johan@...nel.org, gregkh@...uxfoundation.org,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH 02/15] usb: serial: belkin_sa: use usb_control_msg_send()

On Wed, Nov 04, 2020 at 12:16:50PM +0530, Himadri Pandya wrote:
> The new usb_control_msg_send() nicely wraps usb_control_msg() with
> proper error check. Hence use the wrapper instead of calling
> usb_control_msg() directly.
> 
> Signed-off-by: Himadri Pandya <himadrispandya@...il.com>
> ---
>  drivers/usb/serial/belkin_sa.c | 35 +++++++++++++++++-----------------
>  1 file changed, 17 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
> index 9bb123ab9bc9..a5ff55f48303 100644
> --- a/drivers/usb/serial/belkin_sa.c
> +++ b/drivers/usb/serial/belkin_sa.c
> @@ -105,9 +105,10 @@ struct belkin_sa_private {
>  #define WDR_TIMEOUT 5000 /* default urb timeout */
>  
>  /* assumes that struct usb_serial *serial is available */
> -#define BSA_USB_CMD(c, v) usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), \
> -					    (c), BELKIN_SA_SET_REQUEST_TYPE, \
> -					    (v), 0, NULL, 0, WDR_TIMEOUT)
> +#define BSA_USB_CMD(c, v) usb_control_msg_send(serial->dev, 0, (c), \
> +					       BELKIN_SA_SET_REQUEST_TYPE, \
> +					       (v), 0, NULL, 0, WDR_TIMEOUT, \
> +					       GFP_KERNEL)

Also here there's no data stage so there no point in using the new
helpers.

Please drop this one as well.

Johan