[PATCH v2 2/2] scsi: arcmsr: Confirm getting a free ccb is in spin_lock circle

[ching Huang]

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

Confirm getting a free ccb is in spin_lock circle.

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 7cfae1d..127fe50 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -3162,10 +3162,12 @@ message_out:
 
 static struct CommandControlBlock *arcmsr_get_freeccb(struct 
AdapterControlBlock *acb)
 {
-       struct list_head *head = &acb->ccb_free_list;
+       struct list_head *head;
        struct CommandControlBlock *ccb = NULL;
        unsigned long flags;
+
        spin_lock_irqsave(&acb->ccblist_lock, flags);
+       head = &acb->ccb_free_list;
        if (!list_empty(head)) {
                ccb = list_entry(head->next, struct CommandControlBlock, list);
                list_del_init(&ccb->list);