From: "Martin K. Petersen" <mkp@kernel.org>
To: Yingjie Wang <x-professor@outlook.com>
Cc: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"Martin K . Petersen" <mkp@kernel.org>,
"James E . J . Bottomley"
<James.Bottomley@HansenPartnership.com>,
Bart Van Assche <bvanassche@acm.org>,
Jens Axboe <axboe@kernel.dk>,
Yang Xiuwei <yangxiuwei@kylinos.cn>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 0/2] scsi: bsg: report data copyback failures
Date: Fri, 30 Oct 2026 21:08:45 -0400 [thread overview]
Message-ID: <yq1mrru3cdt.fsf@mail.kernel.org> (raw)
In-Reply-To: <cover.1792772194.git.x-professor@outlook.com>
Yingjie,
> The synchronous and io_uring SCSI BSG completion paths discard the
> return value from blk_rq_unmap_user(). For data-in commands that use a
> bounce buffer, unmapping copies the completed data back to userspace.
> A failure during that copyback is then lost, so SG_IO can return
> success and io_uring can post a CQE with res == 0 despite the copyback
> failure.
Applied to 7.4/scsi-staging, thanks!
--
Martin K. Petersen
prev parent reply other threads:[~2026-10-31 1:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 16:23 Yingjie Wang
2026-10-23 16:23 ` [PATCH v2 1/2] scsi: bsg: report synchronous " Yingjie Wang
2026-10-23 16:23 ` [PATCH v2 2/2] scsi: bsg: report io_uring " Yingjie Wang
2026-10-26 1:06 ` [PATCH v2 0/2] scsi: bsg: report " Yang Xiuwei
2026-10-26 17:47 ` Bart Van Assche
2026-10-31 1:08 ` Martin K. Petersen [this message]
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