linux-kernel - Re: [PATCH V4] tty/serial: add support for Xilinx PS UART

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Date:	Fri, 6 May 2011 10:41:34 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	michal.simek@...alogix.com, johnlinn@...cast.net,
	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org, joe@...ches.com,
	John Linn <john.linn@...inx.com>
Subject: Re: [PATCH V4] tty/serial: add support for Xilinx PS UART

On Fri, May 6, 2011 at 6:23 AM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
>> I don't agree with this change. NO_IRQ for microblaze, arm and other is -1. BTW:
>> For ppc is 0. Using NO_IRQ seems to me reasonable.
>
> 0 means "no interrupt".
>
> The old mis-use of -1 is an old mostly ARM specific ugly that ahould be
> going away not getting repeated further. If Microblaze is using this hack
> then it needs to stop.

This will be easier for microblaze when I finish the irq_domain work.
There are patches on the list, but they need to be reworked before
they are ready for mainline consumption.

g.
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