All of lore.kernel.org
 help / color / mirror / Atom feed
From: Tejun Heo <tj@kernel.org>
To: Robert Hancock <hancockr@shaw.ca>
Cc: Tony Battersby <tonyb@cybernetics.com>,
	Jeff Garzik <jgarzik@pobox.com>,
	IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Re: AHCI problem with hotplug
Date: Tue, 30 Dec 2008 09:38:54 +0900	[thread overview]
Message-ID: <49596D9E.3040904@kernel.org> (raw)
In-Reply-To: <49591710.7040102@shaw.ca>

Robert Hancock wrote:
> Tony Battersby wrote:
>>> The BIOS could be tristating the ports.  Does it work if you issue
>>> manual rescan (echo - - - > /sys/class/scsi_host/hostN/scan)?
>>>   
>> No luck.  I get:
>>
>> ata1: hard resetting link
>> ata1: SATA link down (SStatus 0 SControl 0)
>> ata1: EH complete
>>
>> And the drive isn't seen.
> 
> Well, if the controller reports link down there likely isn't much the
> kernel can do about it. I assume that ata1 is in fact where that drive
> gets detected if it's plugged in at boot - you could try all the other
> hosts to be sure..

This is consistent with the BIOS tristating those ports.  I don't
remember the name of the register.  I'll look it up later.

Thanks.

-- 
tejun

  reply	other threads:[~2008-12-30  0:39 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-12-11 20:32 AHCI problem with hotplug Tony Battersby
2008-12-12 16:03 ` Alan Cox
2008-12-29  8:17 ` Tejun Heo
2008-12-29 14:51   ` Tony Battersby
2008-12-29 18:29     ` Robert Hancock
2008-12-30  0:38       ` Tejun Heo [this message]
2009-01-02  3:12         ` Tejun Heo
2009-01-07 15:39           ` Tony Battersby
2009-01-08  2:06             ` Tejun Heo
2009-01-08 14:20               ` Tony Battersby
2009-01-09  0:13                 ` Robert Hancock
2009-01-09 16:30                   ` Tony Battersby
2009-01-14  6:33                     ` Tejun Heo
2009-01-14 21:38                       ` Tony Battersby
2009-01-15  1:31                         ` Tejun Heo
2009-01-15  4:42                           ` Robert Hancock
2009-01-20 22:56                             ` Tony Battersby
2008-12-30 13:41     ` raz ben yehuda

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=49596D9E.3040904@kernel.org \
    --to=tj@kernel.org \
    --cc=hancockr@shaw.ca \
    --cc=jgarzik@pobox.com \
    --cc=linux-ide@vger.kernel.org \
    --cc=tonyb@cybernetics.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.