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To:     Alan Stern <stern@rowland.harvard.edu>
Cc:     Martin Kepplinger <martin.kepplinger@puri.sm>,
        Bart Van Assche <bvanassche@acm.org>, jejb@linux.ibm.com,
        Can Guo <cang@codeaurora.org>, martin.petersen@oracle.com,
        linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
        kernel@puri.sm
Subject: Re: [PATCH] scsi: sd: add runtime pm to open / release
From:   "Martin K. Petersen" <martin.petersen@oracle.com>
Organization: Oracle Corporation
Message-ID: <yq15za68k17.fsf@ca-mkp.ca.oracle.com>
References: <20200706164135.GE704149@rowland.harvard.edu>
        <d0ed766b-88b0-5ad5-9c10-a4c3b2f994e3@puri.sm>
        <20200728200243.GA1511887@rowland.harvard.edu>
        <f3958758-afce-8add-1692-2a3bbcc49f73@puri.sm>
        <20200729143213.GC1530967@rowland.harvard.edu>
Date:   Wed, 29 Jul 2020 10:44:26 -0400
In-Reply-To: <20200729143213.GC1530967@rowland.harvard.edu> (Alan Stern's
        message of "Wed, 29 Jul 2020 10:32:13 -0400")
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Alan,

>> [   77.474632] sd 0:0:0:0: [sda] tag#0 UNKNOWN(0x2003) Result:
>> hostbyte=0x00 driverbyte=0x08 cmd_age=0s
>> [   77.474647] sd 0:0:0:0: [sda] tag#0 Sense Key : 0x6 [current]
>> [   77.474655] sd 0:0:0:0: [sda] tag#0 ASC=0x28 ASCQ=0x0
>> [   77.474667] sd 0:0:0:0: [sda] tag#0 CDB: opcode=0x28 28 00 00 00 60
>> 40 00 00 01 00
>
> This error report comes from the SCSI layer, not the block layer.

This the device telling us that the media (SD card?) has changed.

-- 
Martin K. Petersen	Oracle Linux Engineering