Commit eb3b956d authored by ching Huang's avatar ching Huang Committed by Martin K. Petersen
Browse files

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: default avatarching Huang <ching2048@areca.com.tw>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 4f1826b8

drivers/scsi/arcmsr/arcmsr_hba.c

+3 −1
Original line number Diff line number Diff line
@@ -3162,10 +3162,12 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, 


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);