ide-dma-sff: factor out ide_dma_sff_write_status()

Factor out ide_dma_sff_write_status(), symmetric to ide_dma_sff_read_status().

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

1 files changed, 16 insertions, 21 deletions

diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
index bcdadc777564..123d393658af 100644
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -61,6 +61,16 @@ u8 ide_dma_sff_read_status(ide_hwif_t *hwif)
 }
 EXPORT_SYMBOL_GPL(ide_dma_sff_read_status);
 
+static void ide_dma_sff_write_status(ide_hwif_t *hwif, u8 val)
+{
+        unsigned long addr = hwif->dma_base + ATA_DMA_STATUS;
+
+        if (hwif->host_flags & IDE_HFLAG_MMIO)
+                writeb(val, (void __iomem *)addr);
+        else
+                outb(val, addr);
+}
+
 /**
  *      ide_dma_host_set        -       Enable/disable DMA on a host
  *      @drive: drive to control
@@ -80,11 +90,7 @@ void ide_dma_host_set(ide_drive_t *drive, int on)
         else
                 dma_stat &= ~(1 << (5 + unit));
 
-        if (hwif->host_flags & IDE_HFLAG_MMIO)
-                writeb(dma_stat,
-                       (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
-        else
-                outb(dma_stat, hwif->dma_base + ATA_DMA_STATUS);
+        ide_dma_sff_write_status(hwif, dma_stat);
 }
 EXPORT_SYMBOL_GPL(ide_dma_host_set);
 
@@ -198,7 +204,7 @@ int ide_dma_setup(ide_drive_t *drive)
         }
 
         /* PRD table */
-        if (hwif->host_flags & IDE_HFLAG_MMIO)
+        if (mmio)
                 writel(hwif->dmatable_dma,
                        (void __iomem *)(hwif->dma_base + ATA_DMA_TABLE_OFS));
         else
@@ -214,12 +220,7 @@ int ide_dma_setup(ide_drive_t *drive)
         dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 
         /* clear INTR & ERROR flags */
-        if (mmio)
-                writeb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
-                       (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
-        else
-                outb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
-                     hwif->dma_base + ATA_DMA_STATUS);
+        ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
 
         drive->waiting_for_dma = 1;
         return 0;
@@ -300,13 +301,12 @@ EXPORT_SYMBOL_GPL(ide_dma_start);
 int ide_dma_end(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;
-        u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
         u8 dma_stat = 0, dma_cmd = 0, mask;
 
         drive->waiting_for_dma = 0;
 
         /* stop DMA */
-        if (mmio) {
+        if (hwif->host_flags & IDE_HFLAG_MMIO) {
                 dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
                 writeb(dma_cmd & ~ATA_DMA_START,
                        (void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
@@ -318,13 +318,8 @@ int ide_dma_end(ide_drive_t *drive)
         /* get DMA status */
         dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
 
-        if (mmio)
-                /* clear the INTR & ERROR bits */
-                writeb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
-                       (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
-        else
-                outb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
-                     hwif->dma_base + ATA_DMA_STATUS);
+        /* clear INTR & ERROR bits */
+        ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
 
         /* purge DMA mappings */
         ide_destroy_dmatable(drive);