Re: Linux 2.4.19-rc1-ac5

[Kasper Dupont <kasperd@daimi.au.dk>]

After many hours of trial and error I came to the
conclusion, that the problem must be in these lines
in the file drivers/ide/alim15x3.c

#ifdef CONFIG_BLK_DEV_IDEDMA
        if (m5229_revision >= 0x20) {
                /*
                 * M1543C or newer for DMAing
                 */
                hwif->dmaproc = &ali15x3_dmaproc;
#ifdef CONFIG_IDEDMA_AUTO
                if (!noautodma)
                        hwif->autodma = 1;
#endif /* CONFIG_IDEDMA_AUTO */
        }
#endif /* CONFIG_BLK_DEV_IDEDMA */

CONFIG_IDEDMA_AUTO will always be turned off by
make *config, but if I enable this option by
changing .config with a texteditor DMA actually
works.

This makes me ask the following questions?

1) Why can't CONFIG_IDEDMA_AUTO be enabled from
   make *config?

2) What would it take to fix that?

3) How come DMA works fine with autodma=1, but
   hdparm -d1 /dev/hda fails?

-- 
Kasper Dupont -- der bruger for meget tid på usenet.
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