linux-kernel - Re: [PATCH] tty: serial: msm

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Date:	Mon, 10 Nov 2014 18:07:48 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	frowand.list@...il.com
CC:	Kevin Hilman <khilman@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-serial@...r.kernel.org, Olof Johansson <olof@...om.net>,
	Arnd Bergmann <arnd@...db.de>,
	Tyler Baker <tyler.baker@...aro.org>
Subject: Re: [PATCH] tty: serial: msm_serial: Use DT aliases

On 11/10/2014 05:56 PM, Frank Rowand wrote:
> On 11/10/2014 11:42 AM, Stephen Boyd wrote:
>> diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c
>> index 09364dd8cf3a..d1bc6b6cbc70 100644
>> --- a/drivers/tty/serial/msm_serial.c
>> +++ b/drivers/tty/serial/msm_serial.c
>> @@ -1046,14 +1046,14 @@ static int msm_serial_probe(struct platform_device *pdev)
>>  	const struct of_device_id *id;
>>  	int irq, line;
>>  
>> -	if (pdev->id == -1)
>> -		pdev->id = atomic_inc_return(&msm_uart_next_id) - 1;
>> -
>>  	if (pdev->dev.of_node)
>>  		line = of_alias_get_id(pdev->dev.of_node, "serial");
>>  	else
>>  		line = pdev->id;
>>  
>> +	if (line < 0)
>> +		line = atomic_inc_return(&msm_uart_next_id) - 1;
>> +
>>  	if (unlikely(line < 0 || line >= UART_NR))
> Then this original check for "line < 0" can also be removed.
>
>

Well this matches what was there before. It would do atomic_inc_return
if the line was negative and then still check for a negative value. I
don't mind removing it though. Perhaps we should use an ida?

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

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