From: Tejun Heo <htejun@gmail.com>
To: Mark Lord <liml@rtr.ca>
Cc: jeff@garzik.org, hancockr@shaw.ca, linux-ide@vger.kernel.org
Subject: Re: [PATCH 7/9] libata-acpi: improve _GTF execution error handling and reporting
Date: Fri, 14 Dec 2007 23:15:32 +0900 [thread overview]
Message-ID: <47629004.4040701@gmail.com> (raw)
In-Reply-To: <47628F3A.1060806@rtr.ca>
Mark Lord wrote:
> Tejun Heo wrote:
>> As _GTF commands can't transfer data, device error never signals
>> transfer error. It indicates that the device vetoed the operation, so
>> it's meaningless to retry.
> ..
>
> The SECURITY commands may pass a data block to the drive,
> containing the password required to unlock/freeze a drive.
> I suspect ACPI on many machines will issue such a command,
> and it does indeed transfer data (512 bytes).
Surprise, ACPI _GTF can't do that. Don't ask me why. :-)
--
tejun
next prev parent reply other threads:[~2007-12-14 14:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-14 6:15 [PATCHSET #upstram-fixes] libata-acpi: improve ACPI corner case handling Tejun Heo
2007-12-14 6:15 ` [PATCH 1/9] libata: drop const from struct ata_port param on ata_acpi_gtm/stm() Tejun Heo
2007-12-14 6:15 ` [PATCH 2/9] libata: update ata_*_printk() macros such that level can be a variable Tejun Heo
2007-12-14 6:15 ` [PATCH 3/9] libata: add more opcodes to ata.h Tejun Heo
2007-12-14 6:15 ` [PATCH 4/9] libata: implement ata_acpi_init_gtm() Tejun Heo
2007-12-14 6:15 ` [PATCH 5/9] libata: use init_gtm in ata_acpi_cbl_80wire() Tejun Heo
2007-12-14 6:15 ` [PATCH 6/9] libata-acpi: improve ACPI disabling Tejun Heo
2007-12-14 6:15 ` [PATCH 7/9] libata-acpi: improve _GTF execution error handling and reporting Tejun Heo
2007-12-14 14:12 ` Mark Lord
2007-12-14 14:15 ` Tejun Heo [this message]
2007-12-14 14:45 ` Mark Lord
2007-12-14 14:50 ` Tejun Heo
2007-12-14 14:54 ` Mark Lord
2007-12-14 6:15 ` [PATCH 8/9] libata-acpi: ignore _GTM failure during suspend Tejun Heo
2007-12-14 6:15 ` [PATCH 9/9] libata-acpi: implement _GTF command filtering and filter out LOCK commands Tejun Heo
2007-12-14 7:56 ` [PATCHSET #upstram-fixes] libata-acpi: improve ACPI corner case handling Tejun Heo
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