linux-kernel - Re: [RESEND PATCH v3] scsi: Bypass certain SCSI commands on disks with "use_192_bytes_for

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Message-ID: <yq17c4j9pcr.fsf@ca-mkp.ca.oracle.com>
Date: Thu, 20 Mar 2025 21:08:53 -0400
From: "Martin K. Petersen" <martin.petersen@...cle.com>
To: WangYuli <wangyuli@...ontech.com>
Cc: James.Bottomley@...senPartnership.com, martin.petersen@...cle.com,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        stern@...land.harvard.edu, bvanassche@....org, zhanjun@...ontech.com,
        niecheng1@...ontech.com, guanwentao@...ontech.com,
        Xinwei Zhou
 <zhouxinwei@...ontech.com>, Xu Rao <raoxu@...ontech.com>,
        Yujing Ming
 <mingyujing@...ontech.com>
Subject: Re: [RESEND PATCH v3] scsi: Bypass certain SCSI commands on disks
 with "use_192_bytes_for_3f" attribute


> However, "lshw" disregards the "use_192_bytes_for_3f" attribute and
> transmits data with a length of 0xff bytes via ioctl, which can cause
> some hard drives to hang and become unusable.

I am really not a fan of using in-kernel workarounds to intercept
passthrough commands.

Why does does lshw perform a MODE SENSE in the first place? What
information is it looking for that isn't available in sysfs?

-- 
Martin K. Petersen	Oracle Linux Engineering