linux-kernel - Re: [PATCH v2] scsi: libsas: Fix disk not being scanned in after being removed

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Message-ID: <f52b3c8c-886e-665d-a50d-cba3387d8418@huawei.com>
Date: Tue, 5 Mar 2024 11:00:45 +0800
From: Jason Yan <yanaijie@...wei.com>
To: Xingui Yang <yangxingui@...wei.com>, <john.g.garry@...cle.com>,
	<jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
	<damien.lemoal@...nsource.wdc.com>
CC: <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linuxarm@...wei.com>, <prime.zeng@...ilicon.com>,
	<chenxiang66@...ilicon.com>, <kangfenglong@...wei.com>
Subject: Re: [PATCH v2] scsi: libsas: Fix disk not being scanned in after
 being removed

On 2024/2/27 17:01, Xingui Yang wrote:
> As of commit d8649fc1c5e4 ("scsi: libsas: Do discovery on empty PHY to
> update PHY info"), do discovery will send a new SMP_DISCOVER and update
> phy->phy_change_count. We found that if the disk is reconnected and phy
> change_count changes at this time, the disk scanning process will not be
> triggered.
> 
> So update the PHY info with the last query results.
> 
> Fixes: d8649fc1c5e4 ("scsi: libsas: Do discovery on empty PHY to update PHY info")
> Signed-off-by: Xingui Yang<yangxingui@...wei.com>
> ---
> v1 -> v2:
> Use sas_get_phy_discover() instead of sas_get_phy_attached_dev() in
> sas_rediscover_dev() and use disc_resp to update phy info.
> ---
>   drivers/scsi/libsas/sas_expander.c | 37 ++++++++++++++++++++++--------
>   1 file changed, 28 insertions(+), 9 deletions(-)

Looks good to me:

Reviewed-by: Jason Yan <yanaijie@...wei.com>