On Thu, 27 Oct 2011 13:55:21 -0500
Paul Schilling <paul.s.schilling@xxxxxxxxx> wrote:
> The Vortex86dx uses RDC IDE peripheral integrated into the SOC. The
> CRC design is
> broken in the Vortex86dx and sx. The original reference can be found
> in the Linux kernel itself.
>
> The Vortex86sx uses the RDC D1010.
> The Vortex86dx uses the RDC D1011.
> Both of which have broken CRC hardware which breaks DMA.
CRC hardware is only used for *UDMA* yet your change also disabled MWDMA.
> >> static const struct ata_port_info info_rdc_11 = {
> >> .flags = ATA_FLAG_SLAVE_POSS,
> >> .pio_mask = ATA_PIO4,
> >> - .mwdma_mask = ATA_MWDMA2,
> >> + .mwdma_mask = 0,
> >> + .udma_mask = 0,
Why ?
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