From: Finn Thain <fthain@telegraphics.com.au>
To: Kars de Jong <jongk@linux-m68k.org>
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
Michael Schmitz <schmitzmic@gmail.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] esp_scsi: Clear Transfer Count registers before PIO transfers
Date: Wed, 20 Nov 2019 10:12:21 +1100 (AEDT) [thread overview]
Message-ID: <alpine.LNX.2.21.1.1911201006520.10@nippy.intranet> (raw)
In-Reply-To: <alpine.LNX.2.21.1.1911190923120.8@nippy.intranet>
On Tue, 19 Nov 2019, I wrote:
>
> But this is a theoretical problem so far. You may need to use sg_utils
> to generate a SCSI command like that.
>
> (For a DMA controller subject to, say, 24-bit boundaries, there are
> additional ways to end up with short transfers.)
>
On reflection these probably can't happen in practice. I was being
over-cautious. So I'll leave this patch out-of-tree until there's a need
for it (i.e. some driver that uses both DMA and PIO in data phases).
--
prev parent reply other threads:[~2019-11-19 23:13 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-16 3:36 Finn Thain
2019-11-16 4:30 ` Michael Schmitz
2019-11-16 23:02 ` Finn Thain
2019-11-17 6:26 ` Kars de Jong
2019-11-17 6:29 ` Kars de Jong
2019-11-17 23:13 ` Finn Thain
2019-11-17 23:26 ` Finn Thain
2019-11-18 8:13 ` Kars de Jong
2019-11-18 23:04 ` Finn Thain
2019-11-19 23:12 ` Finn Thain [this message]
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