linux-kernel - Re: [PATCH 3/3] 8250: add workaround for MPC8[356]xx UART break IRQ storm

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Message-ID: <4ED8FE14.7020007@windriver.com>
Date:	Fri, 2 Dec 2011 11:34:28 -0500
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Kumar Gala <galak@...nel.crashing.org>,
	Scott Wood <scottwood@...escale.com>, <gregkh@...e.de>,
	<alan@...ux.intel.com>, <linux-serial@...r.kernel.org>,
	<linuxppc-dev@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] 8250: add workaround for MPC8[356]xx UART break IRQ
 storm

On 11-12-02 06:30 AM, Alan Cox wrote:
>>> OK, I'll simply change the above to CONFIG_PPC then.
>>
>> It does, the bug is in the uart IP which I don't think we ever plan on fixing, so 32 or 64-bit parts will have it for ever and ever ;)
> 
> It should be runtime selected, there should be no ifdefs here.

The ifdef wasn't strictly required; it just made it so gcc would
toss the errata code out of the irq handler for !PPC.  Anyway it
will be a moot point if I can somehow hide all the mess by snooping
serial_inp() traffic and deploying the errata fix from there....

P.

> 
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