Messages in this thread Patch in this message | | | Subject | [PATCH v2 2/2] scsi: arcmsr: Confirm getting a free ccb is in spin_lock circle | From | ching Huang <> | Date | Tue, 27 Oct 2020 11:39:13 +0800 |
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From: ching Huang <ching2048@areca.com.tw>
Confirm getting a free ccb is in spin_lock circle.
Signed-off-by: ching Huang <ching2048@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);
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