ide: remove ->dma_prdtable field from ide_hwif_t

* Use 'hwif->dma_base + {4,8}' instead of hwif->dma_prdtable in
  {ide,scc}_dma_setup().

* Remove no longer needed ->dma_prdtable field from ide_hwif_t.

While at it:

* Use ATA_DMA_TABLE_OFS define.

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

3 files changed, 4 insertions, 7 deletions

diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 767820db7cae..653b1ade13d3 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -464,9 +464,10 @@ int ide_dma_setup(ide_drive_t *drive)
 
         /* PRD table */
         if (hwif->mmio)
-                writel(hwif->dmatable_dma, (void __iomem *)hwif->dma_prdtable);
+                writel(hwif->dmatable_dma,
+                       (void __iomem *)(hwif->dma_base + ATA_DMA_TABLE_OFS));
         else
-                outl(hwif->dmatable_dma, hwif->dma_prdtable);
+                outl(hwif->dmatable_dma, hwif->dma_base + ATA_DMA_TABLE_OFS);
 
         /* specify r/w */
         hwif->OUTB(reading, hwif->dma_command);
@@ -860,8 +861,6 @@ void ide_setup_dma(ide_hwif_t *hwif, unsigned long base)
                 hwif->dma_command       = hwif->dma_base + 0;
         if (!hwif->dma_status)
                 hwif->dma_status        = hwif->dma_base + 2;
-        if (!hwif->dma_prdtable)
-                hwif->dma_prdtable      = hwif->dma_base + 4;
 
         hwif->dma_ops = &sff_dma_ops;
 }
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index 144938188325..910fb00deb71 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -304,7 +304,7 @@ static int scc_dma_setup(ide_drive_t *drive)
         }
 
         /* PRD table */
-        out_be32((void __iomem *)hwif->dma_prdtable, hwif->dmatable_dma);
+        out_be32((void __iomem *)(hwif->dma_base + 8), hwif->dmatable_dma);
 
         /* specify r/w */
         out_be32((void __iomem *)hwif->dma_command, reading);
@@ -838,7 +838,6 @@ static void __devinit init_hwif_scc(ide_hwif_t *hwif)
 
         hwif->dma_command = hwif->dma_base;
         hwif->dma_status = hwif->dma_base + 0x04;
-        hwif->dma_prdtable = hwif->dma_base + 0x08;
 
         /* PTERADD */
         out_be32((void __iomem *)(hwif->dma_base + 0x018), hwif->dmatable_dma);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index d1d0111e48aa..b0135b0c3a04 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -506,7 +506,6 @@ typedef struct hwif_s {
         unsigned long   dma_base;       /* base addr for dma ports */
         unsigned long   dma_command;    /* dma command register */
         unsigned long   dma_status;     /* dma status register */
-        unsigned long   dma_prdtable;   /* actual prd table address */
 
         unsigned long   config_data;    /* for use by chipset-specific code */
         unsigned long   select_data;    /* for use by chipset-specific code */