linux-kernel - RE: [RESENDv5] serial: of-serial: fix up PM ops on no_console

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Date:	Tue, 11 Nov 2014 05:41:10 +0000
From:	Jingchang Lu <jingchang.lu@...escale.com>
To:	Greg KH <gregkh@...uxfoundation.org>,
	Florian Fainelli <f.fainelli@...il.com>
CC:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>
Subject: RE: [RESENDv5] serial: of-serial: fix up PM ops on no_console_suspend
 and port type



>-----Original Message-----
>From: Greg KH [mailto:gregkh@...uxfoundation.org]
>Sent: Tuesday, November 11, 2014 1:27 PM
>To: Florian Fainelli
>Cc: Lu Jingchang-B35083; linux-arm-kernel@...ts.infradead.org; linux-
>kernel@...r.kernel.org; linux-serial@...r.kernel.org
>Subject: Re: [RESENDv5] serial: of-serial: fix up PM ops on
>no_console_suspend and port type
>
>On Mon, Nov 10, 2014 at 08:30:36PM -0800, Florian Fainelli wrote:
>> 2014-10-27 2:24 GMT-07:00 Jingchang Lu <jingchang.lu@...escale.com>:
>> > This patch fixes commit 2dea53bf57783f243c892e99c10c6921e956aa7e,
>> > "serial: of-serial: add PM suspend/resume support", which disables
>> > the uart clock on suspend, but also causes a hardware hang on
>> > register access if no_console_suspend command line option is used.
>> >
>> > Also, not every of_serial device is an 8250 port, so the serial8250
>> > suspend/resume functions should only be applied to a real 8250 port.
>>
>> Greg, can you pick this one and submit it for your next 3.18-rc
>> submission? This fixes a regression when using "no_console_suspend"
>> introduced by:
>>
>> 2dea53bf57783f243c892e99c10c6921e956aa7e ("serial: of-serial: add PM
>> suspend/resume support") which has been merged during 3.18-rc1
>
>Why can't I just revert that patch instead?  This is really late in the -
>rc cycle to be doing large fixes like this.
>
>And this patch is already queued up for 3.19-rc1, so this is a mess...
>
>Any objection to me just reverting
>2dea53bf57783f243c892e99c10c6921e956aa7e, and then this one in my tty-next
>branch as well, and then someone resending the original patch in a format
>that actually works?
Do you mean resending the "serial: of-serial: add PM suspend/resume support"
patch with "serial: of-serial: fix up PM ops on no_console_suspend and port type"
merged together? For you would like to reverting the previous patch of
"2dea53bf57783f243c892e99c10c6921e956aa7e".

Thanks and Best Regards,
Jingchang
>
>thanks,
>
>greg k-h