linux-kernel - Re: [PATCH 4.4 01/16] powerpc/eeh: Fix deadlock when PE frozen state cant be cleared

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Message-Id: <d9e91b6c-0053-c0ab-7641-53b17c17e3fa@au1.ibm.com>
Date:   Wed, 14 Dec 2016 10:59:32 +1100
From:   Andrew Donnellan <andrew.donnellan@....ibm.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Pradipta Ghosh <pradghos@...ibm.com>,
        Russell Currey <ruscur@...sell.cc>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH 4.4 01/16] powerpc/eeh: Fix deadlock when PE frozen state
 cant be cleared

On 14/12/16 04:15, Greg Kroah-Hartman wrote:
> 4.4-stable review patch.  If anyone has any objections, please let me know.
>
> ------------------
>
> From: Andrew Donnellan <andrew.donnellan@....ibm.com>
>
> commit 409bf7f8a02ef88db5a0f2cdcf9489914f4b8508 upstream.
>
> In eeh_reset_device(), we take the pci_rescan_remove_lock immediately after
> after we call eeh_reset_pe() to reset the PCI controller. We then call
> eeh_clear_pe_frozen_state(), which can return an error. In this case, we
> bail out of eeh_reset_device() without calling pci_unlock_rescan_remove().
>
> Add a call to pci_unlock_rescan_remove() in the eeh_clear_pe_frozen_state()
> error path so that we don't cause a deadlock later on.
>
> Reported-by: Pradipta Ghosh <pradghos@...ibm.com>
> Fixes: 78954700631f ("powerpc/eeh: Avoid I/O access during PE reset")
> Signed-off-by: Andrew Donnellan <andrew.donnellan@....ibm.com>
> Acked-by: Russell Currey <ruscur@...sell.cc>
> Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

It seems that something in your scripts munged the apostrophe in the 
summary line when generating these emails. Though it looks fine in the 
actual tree.


Andrew

-- 
Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnellan@....ibm.com  IBM Australia Limited