LKML Archive on
help / color / mirror / Atom feed
From: "Kuan Luo" <>
To: "Jeff Garzik" <>, "Robert Hancock" <>
Cc: "linux-kernel" <>,
	"Tejun Heo" <>, "Peer Chen" <>
Subject: RE: [PATCH] sata_nv: fix nmi intr or system hanging in rhel4u6 adma.
Date: Wed, 27 Feb 2008 12:55:08 +0800	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Jeff wrote:
>robert worte:
> > 
> > This is basically avoiding switching into register mode, 
> right? I don't 
> > think this is a very good solution as the point of the 
> tf_read function 
> > is that it's supposed to read the taskfile provided by the drive to 
> > diagnose the error, so not doing this isn't a good thing.
> Agree with this analysis -- if ->tf_read() is being called, then 
> obviously the core wants a current copy of the device's ATA registers.
> It is not a good solution to simply avoiding returning 
> meaningful data, 
> because -- as Robert notes -- we need tf_read for analysis.
> 	Jeff

The driver got one error : "nv_adma_check_cpb: CPB 0, flags=0x11". The
code entered ata_port_abort -> ata_qc_complete
-> fill_result_tf->nv_adma_tf_read.

Firstly, nv_adma_register_mode failed, showing the below messages:
timeout waiting for ADMA IDLE, stat=0x440
timeout waiting for ADMA LEGACY, stat=0x440

Then enter ata_tf_read function. 
I found the system hung at tf->hob_nsect = ioread8(ioaddr->nsect_addr);
Sometimes the screen showed "
CPU0: Machin check Exception 0000000000000004
Bank 4:b200000000070f0f
kernel panic -not syncing: CPU Context corrupt.
If nv_adma_register_mode failed, the reg result should be not
I don't know why the systm hung.
This email message is for the sole use of the intended recipient(s) and may contain
confidential information.  Any unauthorized review, use, disclosure or distribution
is prohibited.  If you are not the intended recipient, please contact the sender by
reply email and destroy all copies of the original message.

  reply	other threads:[~2008-02-27  4:55 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-26  9:24 Kuan Luo
2008-02-26 14:41 ` Robert Hancock
2008-02-26 16:28   ` Jeff Garzik
2008-02-27  4:55     ` Kuan Luo [this message]
2008-02-27  5:24       ` Robert Hancock
2008-02-28  0:24       ` Robert Hancock
2008-02-28  3:57         ` Kuan Luo

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:

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

  git send-email \ \ \ \ \ \ \ \
    --subject='RE: [PATCH] sata_nv: fix nmi intr or system hanging in rhel4u6 adma.' \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).