From: "Petr Vandrovec" <VANDROVE@vc.cvut.cz>
To: "A.Sajjad Zaidi" <sajjad@vgkk.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Promise, DMA and RAID5 problems running 2.4.1
Date: Wed, 7 Feb 2001 13:15:22 MET-1 [thread overview]
Message-ID: <14CC6FFB19AD@vcnet.vc.cvut.cz> (raw)
On 7 Feb 01 at 19:12, A.Sajjad Zaidi wrote:
> I just built a system that uses a K7V motherboard with the KT133
> chipset. It has an onboard Promise PDC20265 ATA-100 controller. Im
> running RH6.2.
>
> hda: dma_intr: bad DMA status
> hda: dma_intr: status=0x50 { DriveReady SeekComplete }
> hda: dma_intr: bad DMA status
> hda: dma_intr: status=0x50 { DriveReady SeekComplete }
> hda: dma_intr: bad DMA status
> hda: dma_intr: status=0x50 { DriveReady SeekComplete }
> hda: dma_intr: bad DMA status
> hda: dma_intr: status=0x50 { DriveReady SeekComplete }
> hda: DMA disabled
> hdb: DMA disabled
>
> and the system freezes completely. I have no option, but to do a cold
> reboot.
It is known bug which I reported to Andre already. Open
drivers/ide/ide.c in favorite text editor, and replace strange
body of ide_delay_50ms() with simple mdelay(50). Promise driver
invokes ide_delay_50ms with interrupts disabled, so it freezes
here forever. If you have NMI watchdog, you'll get nice oopses.
As for DMA failure itself, I have no idea what is wrong in your
case, but I found that mine Promise works with Linux only iff there
is master on each channel, slave alone does not work. And I did not
tried master+slave together.
Petr Vandrovec
vandrove@vc.cvut.cz
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next reply other threads:[~2001-02-07 12:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-07 13:15 Petr Vandrovec [this message]
2001-02-07 19:33 ` Promise, DMA and RAID5 problems running 2.4.1 Alan Cox
2001-02-08 5:07 ` A.Sajjad Zaidi
[not found] <Pine.LNX.4.10.10102070924340.19012-100000@coffee.psychology.mcmaster.ca>
2001-02-08 2:00 ` A.Sajjad Zaidi
2001-02-08 2:06 ` Stephen Wille Padnos
-- strict thread matches above, loose matches on Subject: below --
2001-02-07 20:40 Petr Vandrovec
2001-02-07 20:06 ` Alan Cox
2001-02-07 20:53 ` Andre Hedrick
2001-02-09 8:09 ` Vojtech Pavlik
2001-02-07 10:12 A.Sajjad Zaidi
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