Messages in this thread | | | Date | Thu, 4 Jul 2002 14:29:38 +0100 | From | Russell King <> | Subject | Re: [PATCH] 2.5.24 IDE 97 |
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On Wed, Jul 03, 2002 at 12:22:11AM +0200, Bartlomiej Zolnierkiewicz wrote: > This patch is a accumulation of ata-hosts-7/8/9/10/11, ata-autodma > and ata-ata66_check patches previously posted on LKML.
From a first review only, it looks like this patch prevents the chipset drivers from disabling DMA mode on initialisation. This is Really Bad(tm) since some revisions of some chipsets must _never_ be placed into DMA mode due to hardware bugs. Even if the user selects CONFIG_IDEDMA_AUTO.
The code in sl82c105.c knows about the chipset revisions that this is required for, and it looks like the code in ide-pci.c will override the chipset if CONFIG_IDEDMA_AUTO is enabled.
-- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html
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