From: ching Huang Date: Tue, 27 Oct 2020 03:39:13 +0000 (+0800) Subject: scsi: arcmsr: Ensure getting a free ccb is done under the spin_lock X-Git-Tag: accepted/tizen/unified/20230118.172025~8143^2~276 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=eb3b956d2c9bfd86ca38ea5ce6343efcbacff641;p=platform%2Fkernel%2Flinux-rpi.git scsi: arcmsr: Ensure getting a free ccb is done under the spin_lock Ensure getting a free ccb is done under the spin_lock. Link: https://lore.kernel.org/r/f3ec374cada762149911ff35e92a68a15a7d0327.camel@areca.com.tw Signed-off-by: ching Huang Signed-off-by: Martin K. Petersen --- 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);