From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH] return valid data buffer length in scsi_bufflen() API
 using RQF_SPECIAL_PAYLOAD
Date: Mon, 13 Feb 2017 05:36:28 -0800
Message-ID: <20170213133628.GA3001@infradead.org>
References: <4c804c26dcaea4a30e89734bb351c523@mail.gmail.com>
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To: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: linux-scsi@vger.kernel.org, hch@infradead.org, Jens Axboe <axboe@kernel.dk>

Hi Kashyap,

can you try 4.10-rc8?  It has "scsi: use blk_rq_payload_bytes" which
initializeѕ sdb->length to blk_rq_payload_bytes(), which should fix
your issue.