ide: (hopefully) fix VDMA for CS5520

* Set the correct hwif->dma_base for the second channel in
  ide_get_or_set_dma_base().

* Remove DMA enable code from cs5520_set_pio_mode(), this can
  be handled by the generic ->dma_host_on method now.

* Add VDMA check to ide_config_drive_speed().

* drive->using_dma was never enabled since cs5520 host driver's
  ->ide_dma_on method overrided the generic ->ide_dma_on (so
  __ide_dma_on() was never called, drive->using_dma was never set
  and VDMA was never used since it depends on drive->using_dma).

  Fix it by using ->dma_host_on method instead of ->ide_dma_on
  (also add matching ->dma_host_off method).

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 7 insertions, 3 deletions

diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index d2cd5a3d38f8..bbfdf7e0f182 100644
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -165,13 +165,17 @@ static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_
 
                 dma_base = pci_resource_start(dev, baridx);
 
-                if (dma_base == 0)
+                if (dma_base == 0) {
                         printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
+                        return 0;
+                }
         }
 
-        if ((d->host_flags & IDE_HFLAG_CS5520) == 0 && dma_base) {
+        if (hwif->channel)
+                dma_base += 8;
+
+        if ((d->host_flags & IDE_HFLAG_CS5520) == 0) {
                 u8 simplex_stat = 0;
-                dma_base += hwif->channel ? 8 : 0;
 
                 switch(dev->device) {
                         case PCI_DEVICE_ID_AL_M5219: