linux-kernel - Re: [PATCH V9 1/4] USB: serial: f81232: fix interrupt worker not stop

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Date:   Fri, 3 May 2019 08:53:53 +0200
From:   Johan Hovold <johan@...nel.org>
To:     "Ji-Ze Hong (Peter Hong)" <hpeter@...il.com>
Cc:     peter_hong@...tek.com.tw, johan@...nel.org,
        gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        "Ji-Ze Hong (Peter Hong)" <hpeter+linux_kernel@...il.com>
Subject: Re: [PATCH V9 1/4] USB: serial: f81232: fix interrupt worker not stop

On Tue, Apr 30, 2019 at 09:22:29AM +0800, Ji-Ze Hong (Peter Hong) wrote:
> The F81232 will use interrupt worker to handle MSR change.
> This patch will fix the issue that interrupt work should stop
> in close() and suspend().
>
> Cc: Johan Hovold <johan@...nel.org>
> Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@...il.com>

> +static int f81232_resume(struct usb_serial *serial)
> +{
> +	struct usb_serial_port *port = serial->port[0];
> +	int result;
> +
> +	if (tty_port_initialized(&port->port)) {
> +		result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
> +		if (result) {
> +			dev_err(&port->dev, "submit interrupt urb failed: %d",
> +					result);

I added the missing '\n' to the error message.

> +			return result;
> +		}
> +	}
> +
> +	return usb_serial_generic_resume(serial);
> +}

This also fixes the issue with interrupt events not being received
after a suspend cycle, so I added that to the commit message.

Johan