[PATCH 2/5] scsi: arcmsr: fixed ADAPTER_TYPE_B 64bits dma compatibility issue

[ching Huang]

From: ching Huang <ching2048@xxxxxxxxxxxx>

This patch fixed ADAPTER_TYPE_B 64bits dma compatibility issue
on some mother board.

Signed-off-by: ching Huang <ching2048@xxxxxxxxxxxx>
---

diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index e8c12dd..d387a38 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -996,6 +996,8 @@ static int arcmsr_set_dma_mask(struct AdapterControlBlock *acb)
 		if (((acb->adapter_type == ACB_ADAPTER_TYPE_A) && !dma_mask_64) ||
 		    dma_set_mask(&pcidev->dev, DMA_BIT_MASK(64)))
 			goto	dma32;
+		if (acb->adapter_type <= ACB_ADAPTER_TYPE_B)
+			return 0;
 		if (dma_set_coherent_mask(&pcidev->dev, DMA_BIT_MASK(64)) ||
 		    dma_set_mask_and_coherent(&pcidev->dev, DMA_BIT_MASK(64))) {
 			printk("arcmsr: set DMA 64 mask failed\n");