linux-kernel - Re: [PATCH 2/2] serial: msm: Add support for UARTDM cores

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Date:	Wed, 19 Jan 2011 18:38:14 -0800
From:	Stepan Moskovchenko <stepanm@...eaurora.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	Jamie Iles <jamie@...ieiles.com>, linux-arm-msm@...r.kernel.org,
	davidb@...eaurora.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, rlove@...gle.com
Subject: Re: [PATCH 2/2] serial: msm: Add support for UARTDM cores

On 1/19/2011 2:24 PM, Russell King - ARM Linux wrote:
> On Wed, Jan 19, 2011 at 02:08:29PM -0800, Stepan Moskovchenko wrote:
>>>> +		/* Mask conditions we're ignorning. */
>>>> +		sr&= port->read_status_mask;
>>>> +		if (sr&   UART_SR_RX_BREAK)
>>>> +			flag = TTY_BREAK;
>>>> +		else if (sr&   UART_SR_PAR_FRAME_ERR)
>>>> +			flag = TTY_FRAME;
>>> It doesn't look like the flag is used anywhere after it has been
>>> assigned.
>> An artifact of an old driver. Removed.
> But still required to support proper error signalling.
>

On second thought, from poking around the kernel some more, I believe 
the following should be a better approach:
         if (sr & UART_SR_RX_BREAK) {
             tty_insert_flip_char(tty, 0, TTY_BREAK);
         } else if (sr & UART_SR_PAR_FRAME_ERR) {
             tty_insert_flip_char(tty, 0, TTY_FRAME);
         }

Russell, what do you think? Shall I make the change in v2?

Thanks
Steve

--
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

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