linux-kernel - Re: [PATCH] jsm: Fixed EEH recovery error

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Message-ID: <20120106210423.GA19379@kroah.com>
Date:	Fri, 6 Jan 2012 13:04:23 -0800
From:	Greg KH <greg@...ah.com>
To:	Lucas Kannebley Tavares <lucaskt@...ux.vnet.ibm.com>
Cc:	Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>,
	Breno Leitao <leitao@...ux.vnet.ibm.com>,
	Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] jsm: Fixed EEH recovery error

On Fri, Jan 06, 2012 at 06:43:46PM -0200, Lucas Kannebley Tavares wrote:
> 
> On 09/12/2011 12:35 PM, Thadeu Lima de Souza Cascardo wrote:
> >On Mon, Sep 12, 2011 at 10:36:05AM -0300, Lucas Kannebley Tavares wrote:
> >>There was an error on the jsm driver that would cause it to be unable to
> >>recover after a second error is detected.
> >>
> >>At the first error, the device recovers properly:
> >>
> >>[72521.485691] EEH: Detected PCI bus error on device 0003:02:00.0
> >>[72521.485695] EEH: This PCI device has failed 1 times in the last hour:
> >>...
> >>[72532.035693] ttyn3 at MMIO 0x0 (irq = 49) is a jsm
> >>[72532.105689] jsm: Port 3 added
> >>
> >>However, at the second error, it cascades until EEH disables the device:
> >>
> >>[72631.229549] Call Trace:
> >>...
> >>[72641.725687] jsm: Port 3 added
> >>[72641.725695] EEH: Detected PCI bus error on device 0003:02:00.0
> >>[72641.725698] EEH: This PCI device has failed 3 times in the last hour:
> >>
> >>It was caused because the PCI state was not being saved after the first
> >>restore. Therefore, at the second recovery the PCI state would not be
> >>restored.
> >>
> >>Signed-off-by: Lucas Kannebley Tavares<lucaskt@...ux.vnet.ibm.com>
> >Signed-off-by: Breno Leitao <brenohl@...ibm.com>
> >Acked-by: Thadeu Lima de Souza Cascardo<cascardo@...ux.vnet.ibm.com>
> 
> Adding Greg to the CC list. It wasn't added earlier because
> get_maintainers.pl only listed Alan's name. I apologize for the
> delay.
> 
> This is a bugfix to EEH handling on jsm.

Can someone send me a patch in a format that I could actually apply it
in?

thanks,

greg k-h
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