linux-kernel - [PATCH 2/5] scsi: arcmsr: fixed ADAPTER_TYPE

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Message-ID: <81c1f98819dfdfa18ae4d3b854b7733af9d34ea5.camel@areca.com.tw>
Date:   Thu, 23 Mar 2023 01:13:20 +0800
From:   ching Huang <ching2048@...ca.com.tw>
To:     martin.petersen@...cle.com, James.Bottomley@...senPartnership.com,
        linux-scsi@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 2/5] scsi: arcmsr: fixed ADAPTER_TYPE_B 64bits dma
 compatibility issue

From: ching Huang <ching2048@...ca.com.tw>

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

Signed-off-by: ching Huang <ching2048@...ca.com.tw>
---

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");