* [PATCH 11/17] scsi: arcmsr: fix clear doorbell queue on ACB_ADAPTER_TYPE_B controller
@ 2017-12-05 2:02 Ching Huang
0 siblings, 0 replies; only message in thread
From: Ching Huang @ 2017-12-05 2:02 UTC (permalink / raw)
To: martin.petersen, linux-scsi, linux-kernel; +Cc: James.Bottomley, sfr
From: Ching Huang <ching2048@areca.com.tw>
fix clear doorbell queue on ACB_ADAPTER_TYPE_B controller
Signed-off-by: Ching Huang <ching2048@areca.com.tw>
---
diff -uprN a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
--- a/drivers/scsi/arcmsr/arcmsr_hba.c 2017-12-05 11:45:52.000000000 +0800
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c 2017-12-05 11:45:34.000000000 +0800
@@ -4196,10 +4196,19 @@ static void arcmsr_clear_doorbell_queue_
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: {
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2017-12-05 2:02 [PATCH 11/17] scsi: arcmsr: fix clear doorbell queue on ACB_ADAPTER_TYPE_B controller Ching Huang
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