cs5535: add missing ->dma_base check

If ->dma_base is not set (== PCI BAR4 cannot be reserved) then DMA hooks
shouldn't be initialized or bad things will happen.

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

1 files changed, 7 insertions, 7 deletions

diff --git a/drivers/ide/pci/cs5535.c b/drivers/ide/pci/cs5535.c
index da606ba6d28c..257865778f92 100644
--- a/drivers/ide/pci/cs5535.c
+++ b/drivers/ide/pci/cs5535.c
@@ -190,12 +190,16 @@ static u8 __devinit cs5535_cable_detect(struct pci_dev *dev)
  */
 static void __devinit init_hwif_cs5535(ide_hwif_t *hwif)
 {
-        int i;
-
         hwif->autodma = 0;
 
         hwif->set_pio_mode = &cs5535_set_pio_mode;
         hwif->set_dma_mode = &cs5535_set_dma_mode;
+
+        hwif->drives[1].autotune = hwif->drives[0].autotune = 1;
+
+        if (hwif->dma_base == 0)
+                return;
+
         hwif->ide_dma_check = &cs5535_dma_check;
 
         hwif->atapi_dma = 1;
@@ -207,11 +211,7 @@ static void __devinit init_hwif_cs5535(ide_hwif_t *hwif)
         if (!noautodma)
                 hwif->autodma = 1;
 
-        /* just setting autotune and not worrying about bios timings */
-        for (i = 0; i < 2; i++) {
-                hwif->drives[i].autotune = 1;
-                hwif->drives[i].autodma = hwif->autodma;
-        }
+        hwif->drives[1].autodma = hwif->drives[0].autodma = hwif->autodma;
 }
 
 static ide_pci_device_t cs5535_chipset __devinitdata = {