linux-kernel - Re: [PATCH 2/5] altera_uart: Add support for polling mode (IRQ-less)

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Message-ID: <20101001132427.GA31865@oksana.dev.rtsoft.ru>
Date:	Fri, 1 Oct 2010 17:24:27 +0400
From:	Anton Vorontsov <cbouatmailru@...il.com>
To:	Tobias Klauser <tklauser@...tanz.ch>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Alan Cox <alan@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] altera_uart: Add support for polling mode
 (IRQ-less)

On Tue, Sep 28, 2010 at 05:45:39PM +0200, Tobias Klauser wrote:
[...]
> > -	ret = request_irq(port->irq, altera_uart_interrupt, IRQF_DISABLED,
> > -			DRV_NAME, port);
> > -	if (ret) {
> > -		pr_err(DRV_NAME ": unable to attach Altera UART %d "
> > -		       "interrupt vector=%d\n", port->line, port->irq);
> > -		return ret;
> > -	}
> > -
> >  	spin_lock_irqsave(&port->lock, flags);
> >  
> >  	/* Enable RX interrupts now */
> > @@ -300,6 +304,19 @@ static int altera_uart_startup(struct uart_port *port)
> >  
> >  	spin_unlock_irqrestore(&port->lock, flags);
> 
> Shouldn't we only enable the RX interrupt if we actually use interrupts?

Why would that matter if we don't use the interrupts? ;-)

But I made the change anyway.

> Also I would retain the order here (first register the interrupt handler
> and then enable the interrupts).

OK, fixed. Thanks!

-- 
Anton Vorontsov
email: cbouatmailru@...il.com
irc://irc.freenode.net/bd2
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