ide: add IDE_HFLAG_SERIALIZE_DMA host flag

* Add IDE_HFLAG_SERIALIZE_DMA host flag to serialize ports
  if DMA is available and handle it in ide_init_port().

* Convert sl82c105 host driver to use this new flag.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c
index 2c2fe59a0d9e..c2127cbdecd3 100644
--- a/drivers/ide/pci/sl82c105.c
+++ b/drivers/ide/pci/sl82c105.c
@@ -296,9 +296,6 @@ static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif)
         hwif->dma_start                 = &sl82c105_dma_start;
         hwif->ide_dma_end               = &sl82c105_dma_end;
         hwif->dma_timeout               = &sl82c105_dma_timeout;
-
-        if (hwif->mate)
-                hwif->serialized = hwif->mate->serialized = 1;
 }
 
 static const struct ide_port_ops sl82c105_port_ops = {
@@ -319,6 +316,7 @@ static const struct ide_port_info sl82c105_chipset __devinitdata = {
 #if defined(CONFIG_LOPEC) || defined(CONFIG_SANDPOINT)
                           IDE_HFLAG_FORCE_LEGACY_IRQS |
 #endif
+                          IDE_HFLAG_SERIALIZE_DMA |
                           IDE_HFLAG_NO_AUTODMA,
         .pio_mask       = ATA_PIO5,
         .mwdma_mask     = ATA_MWDMA2,
@@ -338,6 +336,7 @@ static int __devinit sl82c105_init_one(struct pci_dev *dev, const struct pci_dev
                                  "revision %d, BM-DMA disabled\n", rev);
                 d.init_hwif = NULL;
                 d.mwdma_mask = 0;
+                d.host_flags &= ~IDE_HFLAG_SERIALIZE_DMA;
         }
 
         return ide_setup_pci_device(dev, &d);