triflex: 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, 3 insertions, 0 deletions

diff --git a/drivers/ide/pci/triflex.c b/drivers/ide/pci/triflex.c
index 024bbfae0429..098692a6d615 100644
--- a/drivers/ide/pci/triflex.c
+++ b/drivers/ide/pci/triflex.c
@@ -115,6 +115,9 @@ static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
         hwif->tuneproc = &triflex_tune_drive;
         hwif->speedproc = &triflex_tune_chipset;
 
+        if (hwif->dma_base == 0)
+                return;
+
         hwif->atapi_dma  = 1;
         hwif->mwdma_mask = 0x07;
         hwif->swdma_mask = 0x07;