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| author | Ching Huang <ching2048@areca.com.tw> | 2017-12-05 10:02:16 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-12-06 19:32:41 -0500 |
| commit | 2124c5b2cc6a4dc92f609378ecadb66e686efb5f (patch) | |
| tree | c9e6c61d2facb1acb05a64c5357d44df6115b159 /drivers/scsi/arcmsr | |
| parent | b416c099472a64949143a1effa369e5c938429ab (diff) | |
| download | lwn-2124c5b2cc6a4dc92f609378ecadb66e686efb5f.tar.gz lwn-2124c5b2cc6a4dc92f609378ecadb66e686efb5f.zip | |
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>
Diffstat (limited to 'drivers/scsi/arcmsr')
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr_hba.c | 13 |
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: { |