[SCSI] dpt_i2o: driver is only 32 bit so don't set 64 bit DMA mask

This fixes a potential corruption bug where the truncation would cause
reading or writing to the wrong memory area on machines with >4GB of
main memory.

Cc: Stable Kernel Tree <[e-mail]>
Signed-off-by: James Bottomley <[e-mail]>

drivers/scsi/dpt_i2o.c

···
 	}
 
 	pci_set_master(pDev);
-	if (pci_set_dma_mask(pDev, DMA_64BIT_MASK) &&
-	    pci_set_dma_mask(pDev, DMA_32BIT_MASK))
+	if (pci_set_dma_mask(pDev, DMA_32BIT_MASK))
 		return -EINVAL;
 
 	base_addr0_phys = pci_resource_start(pDev,0);