[PATCH 3/4] scsi: arcmsr: Sleep to avoid CPU stuck too long for waiting adapter ready

[Ching Huang]

From: Ching Huang <ching2...@areca.com.tw>

Sleep to avoid CPU stuck too long for waiting adapter ready.

Signed-off-by: Ching Huang <ching2...@areca.com.tw>
---

diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index 2f52c53..732b5d9 100755
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -3807,6 +3807,8 @@ static void arcmsr_wait_firmware_ready(struct 
AdapterControlBlock *acb)
        case ACB_ADAPTER_TYPE_A: {
                struct MessageUnit_A __iomem *reg = acb->pmuA;
                do {
+                       if (!(acb->acb_flags & ACB_F_IOP_INITED))
+                               msleep(20);
                        firmware_state = readl(&reg->outbound_msgaddr1);
                } while ((firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) 
== 0);
                }
@@ -3815,6 +3817,8 @@ static void arcmsr_wait_firmware_ready(struct 
AdapterControlBlock *acb)
        case ACB_ADAPTER_TYPE_B: {
                struct MessageUnit_B *reg = acb->pmuB;
                do {
+                       if (!(acb->acb_flags & ACB_F_IOP_INITED))
+                               msleep(20);
                        firmware_state = readl(reg->iop2drv_doorbell);
                } while ((firmware_state & ARCMSR_MESSAGE_FIRMWARE_OK) == 0);
                writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT, reg->drv2iop_doorbell);
@@ -3823,6 +3827,8 @@ static void arcmsr_wait_firmware_ready(struct 
AdapterControlBlock *acb)
        case ACB_ADAPTER_TYPE_C: {
                struct MessageUnit_C __iomem *reg = acb->pmuC;
                do {
+                       if (!(acb->acb_flags & ACB_F_IOP_INITED))
+                               msleep(20);
                        firmware_state = readl(&reg->outbound_msgaddr1);
                } while ((firmware_state & ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK) == 
0);
                }
@@ -3830,6 +3836,8 @@ static void arcmsr_wait_firmware_ready(struct 
AdapterControlBlock *acb)
        case ACB_ADAPTER_TYPE_D: {
                struct MessageUnit_D *reg = acb->pmuD;
                do {
+                       if (!(acb->acb_flags & ACB_F_IOP_INITED))
+                               msleep(20);
                        firmware_state = readl(reg->outbound_msgaddr1);
                } while ((firmware_state &
                        ARCMSR_ARC1214_MESSAGE_FIRMWARE_OK) == 0);
@@ -3838,6 +3846,8 @@ static void arcmsr_wait_firmware_ready(struct 
AdapterControlBlock *acb)
        case ACB_ADAPTER_TYPE_E: {
                struct MessageUnit_E __iomem *reg = acb->pmuE;
                do {
+                       if (!(acb->acb_flags & ACB_F_IOP_INITED))
+                               msleep(20);
                        firmware_state = readl(&reg->outbound_msgaddr1);
                } while ((firmware_state & ARCMSR_HBEMU_MESSAGE_FIRMWARE_OK) == 
0);
                }