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Date: Tue, 30 Aug 2016 10:47:05 +0200
From: Greg KH <greg@kroah.com>
To: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Cc: stable@vger.kernel.org
Subject: Re: 949e9b827eb4736d96df520c67d07a54c64e99b8 powerpc/eeh:
 eeh_pci_enable(): fix checking of post-request state
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On Tue, Aug 23, 2016 at 01:45:41PM +1000, Andrew Donnellan wrote:
> Dear stable team
> 
> Could you please cherry-pick the following:
> 
> Commit: 949e9b827eb4736d96df520c67d07a54c64e99b8
> 
> Title: powerpc/eeh: eeh_pci_enable(): fix checking of post-request state
> 
> Versions: 3.18, 4.1, 4.4 (doesn't apply cleanly on <= 3.16)
> 
> Justification: Without this patch, in some circumstances EEH incorrectly
> attempts to continue PCI recovery believing that MMIO and DMA have been
> unfrozen, when they haven't, and in turn calls back into the device driver
> even though the device is not accessible. This bug has been observed several
> times on IBM CAPI/cxl test systems.

Applied to 4.4-stable, thanks.

greg k-h