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authorChing Huang <ching2048@areca.com.tw>2017-12-05 10:02:16 +0800
committerMartin K. Petersen <martin.petersen@oracle.com>2017-12-06 19:32:41 -0500
commit2124c5b2cc6a4dc92f609378ecadb66e686efb5f (patch)
treec9e6c61d2facb1acb05a64c5357d44df6115b159
parentb416c099472a64949143a1effa369e5c938429ab (diff)
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>
-rw-r--r--drivers/scsi/arcmsr/arcmsr_hba.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index 716ecec0df5a..c63d6757fee5 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -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: {