src/patches/suse-2.6.27.31/patches.drivers/libata-pata_hpt366-no-ATAPI-DMA

   1 From: Tejun Heo <tj@kernel.org>
   2 Subject: pata_hpt366: no ATAPI DMA
   3 References: bnc#362159
   4
   5 IDE hpt366 driver doesn't allow DMA for ATAPI devices and MWDMA2 on
   6 ATAPI device locks up pata_hpt366.  Follow the suit.
   7
   8 Signed-off-by: Tejun Heo <tj@kernel.org>
   9 Signed-off-by: Tejun Heo <teheo@suse.de>
  10 ---
  11  drivers/ata/pata_hpt366.c |    4 +++-
  12  1 file changed, 3 insertions(+), 1 deletion(-)
  13
  14 Index: work/drivers/ata/pata_hpt366.c
  15 ===================================================================
  16 --- work.orig/drivers/ata/pata_hpt366.c
  17 +++ work/drivers/ata/pata_hpt366.c
  18 @@ -183,7 +183,9 @@ static unsigned long hpt366_filter(struc
  19                         mask &= ~(0xF8 << ATA_SHIFT_UDMA);
  20                 if (hpt_dma_blacklisted(adev, "UDMA4", bad_ata66_4))
  21                         mask &= ~(0xF0 << ATA_SHIFT_UDMA);
  22 -       }
  23 +       } else if (adev->class == ATA_DEV_ATAPI)
  24 +               mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
  25 +
  26         return ata_bmdma_mode_filter(adev, mask);
  27  }
  28