From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-ide@vger.kernel.org, Joe Jin <lkmaillist@gmail.com>
Subject: Re: [PATCH] libata: handle 0xff status properly
Date: Tue, 31 Oct 2006 23:50:16 -0500 [thread overview]
Message-ID: <45482788.9050804@pobox.com> (raw)
In-Reply-To: <20061009093215.GF10832@htj.dyndns.org>
Tejun Heo wrote:
> libata waits for !BSY even when the status register reports 0xff.
> This causes long boot delays when D8 isn't pulled down properly. This
> patch does the followings.
>
> * don't wait if status register is 0xff in all wait functions
>
> * make ata_busy_sleep() return 0 on success and -errno on failure.
> -ENODEV is returned on 0xff status and -EBUSY on other failures.
>
> * make ata_bus_softreset() succeed on 0xff status. 0xff status is not
> reset failure. It indicates no device. This removes unnecessary
> retries on such ports. Note that the code change assumes unoccupied
> port reporting 0xff status does not produce valid device signature.
>
> Signed-off-by: Tejun Heo <htejun@gmail.com>
> Cc: Joe Jin <lkmaillist@gmail.com>
applied to #upstream
prev parent reply other threads:[~2006-11-01 4:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-09 9:32 [PATCH] libata: handle 0xff status properly Tejun Heo
2006-10-11 16:16 ` Alan Cox
2006-11-01 4:50 ` Jeff Garzik [this message]
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