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scsi: arcmsr: Fix clear doorbell queue on ACB_ADAPTER_TYPE_B 

Fix clear doorbell queue on ACB_ADAPTER_TYPE_B controller.

Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ching Huang 2017-12-05 10:02:16 +08:00 committed by Martin K. Petersen
parent b416c09947
commit 2124c5b2cc
1 changed files with 11 additions and 2 deletions
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13
drivers/scsi/arcmsr/arcmsr_hba.c
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@ -4196,10 +4196,19 @@ static void arcmsr_clear_doorbell_queue_buffer(struct AdapterControlBlock *acb)
case ACB_ADAPTER_TYPE_B: {
struct MessageUnit_B *reg = acb->pmuB;
/*clear interrupt and message state*/
writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
uint32_t outbound_doorbell, i;
writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell);
/* let IOP know data has been read */
for(i=0; i < 200; i++) {
msleep(20);
outbound_doorbell = readl(reg->iop2drv_doorbell);
if( outbound_doorbell & ARCMSR_IOP2DRV_DATA_WRITE_OK) {
writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell);
} else
break;
}
}
break;
case ACB_ADAPTER_TYPE_C: {