From: Tejun Heo <tj@kernel.org>
To: Loc Ho <lho@apm.com>
Cc: David Milburn <dmilburn@redhat.com>,
"olof@lixom.net" <olof@lixom.net>,
"arnd@arndb.de" <arnd@arndb.de>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"jcm@redhat.com" <jcm@redhat.com>,
"patches@apm.com" <patches@apm.com>, Tuan Phan <tphan@apm.com>,
Suman Tripathi <stripathi@apm.com>
Subject: Re: [PATCH v8 3/4] ata: Add APM X-Gene SoC SATA host controller driver
Date: Tue, 14 Jan 2014 11:30:08 -0500 [thread overview]
Message-ID: <20140114163008.GJ12131@htj.dyndns.org> (raw)
In-Reply-To: <CAPw-ZTmn6JiDku=vz=m9v5MNuFrK_-d0ehU_88drCYGHM8Wv=Q@mail.gmail.com>
On Tue, Jan 14, 2014 at 08:21:28AM -0800, Loc Ho wrote:
> In the ISR, the AHCI library code reads the CI register and then
> performs XOR to determine which commands are completed. Then it goes
> and processes the completed command(s). I am worry that the process of
> processing the completed command(s), the upper layer may act on the
> data before the data arrived at the DDR/cache. In answering your
> question, yes.
Is this an explicit errata on the hardware? Have you actually
observed this or is it just a speculation?
--
tejun
next prev parent reply other threads:[~2014-01-14 16:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-06 18:11 [PATCH v8 0/4] ata: Add APM X-Gene SoC SATA host controller support Loc Ho
2014-01-06 18:11 ` [PATCH v8 1/4] ata: Export required functions by APM X-Gene SATA driver Loc Ho
2014-01-06 18:12 ` [PATCH v8 2/4] Documentation: Add documentation for APM X-Gene SoC SATA host controller DTS binding Loc Ho
2014-01-06 18:12 ` [PATCH v8 3/4] ata: Add APM X-Gene SoC SATA host controller driver Loc Ho
2014-01-06 18:12 ` [PATCH v8 4/4] arm64: Add APM X-Gene SoC SATA host controller DTS entries Loc Ho
2014-01-10 19:45 ` [PATCH v8 3/4] ata: Add APM X-Gene SoC SATA host controller driver David Milburn
2014-01-10 20:07 ` David Milburn
2014-01-11 19:31 ` Tejun Heo
2014-01-12 3:58 ` Loc Ho
2014-01-12 11:49 ` Tejun Heo
2014-01-13 4:01 ` Loc Ho
2014-01-13 16:08 ` Tejun Heo
2014-01-14 15:57 ` Loc Ho
2014-01-14 16:03 ` Tejun Heo
2014-01-14 16:04 ` Tejun Heo
2014-01-14 16:21 ` Loc Ho
2014-01-14 16:30 ` Tejun Heo [this message]
[not found] ` <20140114163008.GJ12131-Gd/HAXX7CRxy/B6EtB590w@public.gmane.org>
2014-01-14 16:37 ` Loc Ho
2014-01-14 16:46 ` Tejun Heo
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