1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/ide/pci/siimage.c b/drivers/ide/pci/siimage.c
index 174a873b4c64..134868c71c34 100644
--- a/drivers/ide/pci/siimage.c
+++ b/drivers/ide/pci/siimage.c
@@ -116,13 +116,14 @@ static inline unsigned long siimage_seldev(ide_drive_t *drive, int r)
 {
         ide_hwif_t *hwif        = HWIF(drive);
         unsigned long base      = (unsigned long)hwif->hwif_data;
+        u8 unit                 = drive->dn & 1;
 
         base += 0xA0 + r;
         if (hwif->host_flags & IDE_HFLAG_MMIO)
                 base += hwif->channel << 6;
         else
                 base += hwif->channel << 4;
-        base |= drive->select.b.unit << drive->select.b.unit;
+        base |= unit << unit;
         return base;
 }
 
@@ -255,7 +256,7 @@ static void sil_set_pio_mode(ide_drive_t *drive, u8 pio)
         u8 addr_mask            = hwif->channel ? (mmio ? 0xF4 : 0x84)
                                                 : (mmio ? 0xB4 : 0x80);
         u8 mode                 = 0;
-        u8 unit                 = drive->select.b.unit;
+        u8 unit                 = drive->dn & 1;
 
         /* trim *taskfile* PIO to the slowest of the master/slave */
         if (pair) {
@@ -301,9 +302,9 @@ static void sil_set_dma_mode(ide_drive_t *drive, const u8 speed)
 
         ide_hwif_t *hwif        = HWIF(drive);
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
-        u16 ultra = 0, multi    = 0;
-        u8 mode = 0, unit       = drive->select.b.unit;
         unsigned long base      = (unsigned long)hwif->hwif_data;
+        u16 ultra = 0, multi    = 0;
+        u8 mode = 0, unit       = drive->dn & 1;
         u8 mmio                 = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
         u8 scsc = 0, addr_mask  = hwif->channel ? (mmio ? 0xF4 : 0x84)
                                                 : (mmio ? 0xB4 : 0x80);