From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: Mark Lord <mlord@pobox.com>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>
Subject: Re: libata-dev#upstream pdc_adma fails IDENTIFY w/ AC_ERR_HSM
Date: Fri, 04 Aug 2006 11:30:43 -0400 [thread overview]
Message-ID: <44D36823.7020406@pobox.com> (raw)
In-Reply-To: <44D336EE.5000907@gmail.com>
Tejun Heo wrote:
> [adma_intr_mmio ] ata1: protocol 2 (dev_stat 0x58)
> [ata_port_flush_task ] ENTER
> [ata_port_flush_task ] flush #1
> ata1: ata_port_flush_task: flush #2
> ata1: ata_port_flush_task: EXIT
> ata1.00: failed to IDENTIFY (I/O error, err_mask=0x2)
AC_ERR_HSM comes from the call to ac_err_mask(). Given a Status of
0x58, it would appear that DRQ is asserted.
So if I had to guess, I would say that the above interrupt is the
DRQ-is-asserted indication, which would imply perhaps that this driver
should not bother with PIO polling.
Jeff
next prev parent reply other threads:[~2006-08-04 15:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-04 12:00 libata-dev#upstream pdc_adma fails IDENTIFY w/ AC_ERR_HSM Tejun Heo
2006-08-04 13:56 ` Mark Lord
2006-08-04 14:18 ` Tejun Heo
2006-08-04 15:02 ` Tejun Heo
2006-08-04 15:30 ` Jeff Garzik [this message]
2006-08-04 16:09 ` Mark Lord
2006-08-04 16:26 ` Tejun Heo
2006-08-08 6:18 ` Albert Lee
2006-08-09 9:30 ` Tejun Heo
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