linux-kernel - Re: [PATCH 2.6.19-rc1] Toshiba TC86C001 IDE driver

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Date:	Wed, 13 Dec 2006 17:16:45 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Alan <alan@...rguk.ukuu.org.uk>
Cc:	akpm@...l.org, bzolnier@...il.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.19-rc1] Toshiba TC86C001 IDE driver

Hello.

Alan wrote:

>>+ * We work around this by initiating dummy, zero-length DMA transfer on
>>+ * a DMA timeout expiration. I found no better way to do this with the current

> Novel workaround and probably better than resetting the chip as the
> winbong does.

    I didn't try resetting however the datasheet suggests it just won't do.

>>+static int tc86c001_busproc(ide_drive_t *drive, int state)
>>+{

> Waste of space having a busproc routine. The maintainer removed all the
> usable hotplug support from old IDE so this might as well be dropped.

    Don't know what you mean, ioctl is still there...

>>@@ -1407,6 +1407,24 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_IN
>> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x260a, quirk_intel_pcie_pm);
>> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,	0x260b, quirk_intel_pcie_pm);

>>+/*
>>+ * Toshiba TC86C001 IDE controller reports the standard 8-byte BAR0 size
>>+ * but PIO transfer won't work if BAR0 falls at the odd 8 bytes.
>>+ * Re-allocate the region if needed.
>>+ */

> NAK. I think this fixup should be testing if the device port 0 is in
> native mode before doing the fixup. In comaptibility mode bar 0 is

    The chip is native mode only.

> "Close but no cookie": please fix the PCI quirk to match the current -mm
> behaviour with the ATA resource tree. Otherwise - nice driver.

    Ugh, I should've expected some backstab from -mm tree...

> Alan

WBR, Sergei
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