linux-kernel - Re: [PATCH] serial: fix enable_irq_wake/disable_irq_wake imbalance in serial

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Date:	Wed, 21 May 2008 20:59:37 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org, alan@...rguk.ukuu.org.uk
Subject: Re: [PATCH] serial: fix enable_irq_wake/disable_irq_wake imbalance
 in serial_core.c

Andrew Morton wrote:
>>  	}
>>  
>> -	if (!port->suspended) {
>> +	tty_dev = device_find_child(port->dev, &match, serial_match_port);
>> +	if (!port->suspended && device_may_wakeup(tty_dev)) {
>>  		disable_irq_wake(port->irq);
>>  		mutex_unlock(&state->mutex);
>>  		return 0;
> 
> erp, is that the easiest way of going from a uart_driver* to a device*?
> Doing a lookup each time is a bit unusual.
> 

this is during suspend/resume only, so I figured it wasn't going to be that performance critical;
I wanted the code to be as symmetric as possible rather than fastest..
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