linux-kernel - Re: [PATCH 6/7] scsi: hisi_sas: fix probe ordering problem

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Message-ID: <20170119085516.GJ5054@linux-x5ow.site>
Date:   Thu, 19 Jan 2017 09:55:16 +0100
From:   Johannes Thumshirn <jthumshirn@...e.de>
To:     John Garry <john.garry@...wei.com>
Cc:     jejb@...ux.vnet.ibm.com, martin.petersen@...cle.com,
        linuxarm@...wei.com, zhangfei.gao@...aro.org, xuwei5@...ilicon.com,
        john.garry2@...l.dcu.ie, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Xiang Chen <chenxiang66@...ilicon.com>
Subject: Re: [PATCH 6/7] scsi: hisi_sas: fix probe ordering problem

On Thu, Jan 19, 2017 at 12:32:52AM +0800, John Garry wrote:
> From: Xiang Chen <chenxiang66@...ilicon.com>
> 
> There is a potential probe issue in how we trigger the hw initialisation.
> Although we use 1s timer to delay hw initialisation, there is still a
> potential that sas_register_ha() is not be finished before we start
> the PHY init from hw->hw_init().
> To avoid this issue, initialise the hw after sas_register_ha() in the
> same probe context.
> Note: it is not necessary to use 1s timer now (modified v2 hw only).
> 
> Signed-off-by: Xiang Chen <chenxiang66@...ilicon.com>
> Signed-off-by: John Garry <john.garry@...wei.com>
> ---

Looks OK,
Reviewed-by: Johannes Thumshirn <jthumshirn@...e.de>

-- 
Johannes Thumshirn                                          Storage
jthumshirn@...e.de                                +49 911 74053 689
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