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Date: Fri, 24 Nov 2000 11:57:43 +0100
From: Vojtech Pavlik <vojtech@suse.cz>
To: Kafu Nagai <nkafu@easynews.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Recent ide patches and DMA
Message-ID: <20001124115743.D1104@suse.cz>
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In-Reply-To: <200011232109.NAA29837@mail11.bigmailbox.com>; from nkafu@easynews.com on Thu, Nov 23, 2000 at 01:09:35PM -0800
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On Thu, Nov 23, 2000 at 01:09:35PM -0800, Kafu Nagai wrote:
> With recent ide patches, the ide driver seems to try to use DMA mode even for a drive which dosen't support it. CONFIG_IDEDMA_PCI_AUTO is enabled but even so with the stock kernel this dosen't happen. older patches didn't have this behavior either. Is this change intentional ?
> 
> hdc: 333630 sectors (171 MB) w/32KiB Cache, CHS=1011/15/22, DMA
> Partition check:
>  hda: hda1 hda2 hda3 hda4 < hda5 hda6 hda7 hda8 >
>  hdc:hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x04 { DriveStatusError }
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x04 { DriveStatusError }
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x04 { DriveStatusError }
> hdc: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> hdc: dma_intr: error=0x04 { DriveStatusError }
> hdc: DMA disabled
> ide1: reset: success
>  hdc1
> 
> ~ $ hdparm -i /dev/hdc
>  
> /dev/hdc:
>  
>  Model=QUANTUM ELS170A, FwRev=4.20, SerialNo=166304085456
>  Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>5Mbs RotSpdTol>.5% }
>  RawCHS=1011/15/22, TrkSize=11264, SectSize=512, ECCbytes=4
>  BuffType=3(DualPortCache), BuffSize=32kB, MaxMultSect=8, MultSect=off
>  DblWordIO=no, OldPIO=2, DMA=no
>  CurCHS=1011/15/22, CurSects=333629, LBA=no                                         

Which chipset are you using?

-- 
Vojtech Pavlik
SuSE Labs
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