From: Johan Hovold <johan@kernel.org>
To: Himadri Pandya <himadrispandya@gmail.com>
Cc: linux-usb@vger.kernel.org,
linux-kernel-mentees@lists.linuxfoundation.org, johan@kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [Linux-kernel-mentees] [PATCH 11/15] usb: serial: ipaq: use usb_control_msg_send()
Date: Fri, 4 Dec 2020 11:21:06 +0100 [thread overview]
Message-ID: <X8oNktd8Q0U+PlWO@localhost> (raw)
In-Reply-To: <20201104064703.15123-12-himadrispandya@gmail.com>
On Wed, Nov 04, 2020 at 12:16:59PM +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@gmail.com>
> ---
> drivers/usb/serial/ipaq.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
> index f81746c3c26c..99505a76035d 100644
> --- a/drivers/usb/serial/ipaq.c
> +++ b/drivers/usb/serial/ipaq.c
> @@ -530,15 +530,14 @@ static int ipaq_open(struct tty_struct *tty,
> */
> while (retries) {
> retries--;
> - result = usb_control_msg(serial->dev,
> - usb_sndctrlpipe(serial->dev, 0), 0x22, 0x21,
> - 0x1, 0, NULL, 0, 100);
> - if (!result)
> + result = usb_control_msg_send(serial->dev, 0, 0x22, 0x21, 0x1,
> + 0, NULL, 0, 100, GFP_KERNEL);
> + if (result == 0)
> break;
There's not point in using the new helper since there's no data stage
and usb_control_msg already returns negative errno or 0.
> msleep(1000);
> }
> - if (!retries && result) {
> + if (result) {
> dev_err(&port->dev, "%s - failed doing control urb, error %d\n",
> __func__, result);
> return result;
This looks like just an unrelated simplification of the logic; there was
never any need to check !retries here. You can send that as a clean up
patch of its own if you want.
Johan
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next prev parent reply other threads:[~2020-12-04 10:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-04 6:46 [Linux-kernel-mentees] [PATCH 00/15] usb: serial: avoid using usb_control_msg() directly Himadri Pandya
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 01/15] usb: serial: ark3116: use usb_control_msg_recv() and usb_control_msg_send() Himadri Pandya
2020-12-04 9:16 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 02/15] usb: serial: belkin_sa: use usb_control_msg_send() Himadri Pandya
2020-12-04 9:17 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 03/15] usb: serial: ch314: use usb_control_msg_recv() and usb_control_msg_send() Himadri Pandya
2020-12-04 9:24 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 04/15] usb: serial: cp210x: " Himadri Pandya
2020-12-04 9:34 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 05/15] usb: serial: cypress_m8: " Himadri Pandya
2020-12-04 9:37 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 06/15] usb: serial: f81232: " Himadri Pandya
2020-12-04 9:49 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 07/15] usb: serial: f81534: " Himadri Pandya
2020-12-04 9:55 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 08/15] usb: serial: ftdi_sio: " Himadri Pandya
2020-12-04 10:03 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 09/15] usb: serial: io_edgeport: " Himadri Pandya
2020-12-04 10:10 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 10/15] usb: serial: io_ti: " Himadri Pandya
2020-12-04 10:12 ` Johan Hovold
2020-11-04 6:46 ` [Linux-kernel-mentees] [PATCH 11/15] usb: serial: ipaq: use usb_control_msg_send() Himadri Pandya
2020-12-04 10:21 ` Johan Hovold [this message]
2020-11-04 6:47 ` [Linux-kernel-mentees] [PATCH 12/15] usb: serial: ipw: " Himadri Pandya
2020-12-04 10:27 ` Johan Hovold
2020-11-04 6:47 ` [Linux-kernel-mentees] [PATCH 13/15] usb: serial: iuu_phoenix: " Himadri Pandya
2020-12-04 10:28 ` Johan Hovold
2020-11-04 6:47 ` [Linux-kernel-mentees] [PATCH 14/15] usb: serial: keyspan_pda: use usb_control_msg_recv() and usb_control_msg_send() Himadri Pandya
2020-12-04 10:31 ` Johan Hovold
2020-11-04 6:47 ` [Linux-kernel-mentees] [PATCH 15/15] usb: serial: kl5kusb105: " Himadri Pandya
2020-12-04 10:37 ` Johan Hovold
2020-11-06 10:43 ` [Linux-kernel-mentees] [PATCH 00/15] usb: serial: avoid using usb_control_msg() directly Greg KH
2020-12-04 9:09 ` Johan Hovold
2020-12-24 10:01 ` Himadri Pandya
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