cs5520: fix ->dma_base equal zero handling

Set hwif->ide_dma_{check,on} and hwif->autodma to 1 after checking that
->dma_base exists.  If ->dma_base is not set (== PCI BAR4 cannot be reserved)
then DMA hooks shouldn't be initialized or bad things will happen.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 9 insertions, 10 deletions

diff --git a/drivers/ide/pci/cs5520.c b/drivers/ide/pci/cs5520.c
index cb2a10203dc4..fbce90048aec 100644
--- a/drivers/ide/pci/cs5520.c
+++ b/drivers/ide/pci/cs5520.c
@@ -142,25 +142,24 @@ static void __devinit init_hwif_cs5520(ide_hwif_t *hwif)
 {
         hwif->set_pio_mode = &cs5520_set_pio_mode;
         hwif->set_dma_mode = &cs5520_set_dma_mode;
-        hwif->ide_dma_check = &cs5520_config_drive_xfer_rate;
-        hwif->ide_dma_on = &cs5520_dma_on;
 
-        if(!noautodma)
-                hwif->autodma = 1;
-        
-        if(!hwif->dma_base)
-        {
-                hwif->drives[0].autotune = 1;
-                hwif->drives[1].autotune = 1;
+        if (hwif->dma_base == 0) {
+                hwif->drives[1].autotune = hwif->drives[0].autotune = 1;
                 return;
         }
 
+        hwif->ide_dma_check = &cs5520_config_drive_xfer_rate;
+        hwif->ide_dma_on = &cs5520_dma_on;
+
         /* ATAPI is harder so leave it for now */
         hwif->atapi_dma = 0;
         hwif->ultra_mask = 0;
         hwif->swdma_mask = 0;
         hwif->mwdma_mask = 0;
-        
+
+        if (!noautodma)
+                hwif->autodma = 1;
+
         hwif->drives[0].autodma = hwif->autodma;
         hwif->drives[1].autodma = hwif->autodma;
 }