UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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 <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
ching Huang 2020-10-27 11:39:13 +08:00 committed by Martin K. Petersen
parent 4f1826b8e5
commit eb3b956d2c
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/scsi/arcmsr/arcmsr_hba.c
View File

@ -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);