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| author | ching Huang <ching2048@areca.com.tw> | 2020-10-27 11:39:13 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-10-29 22:10:34 -0400 |
| commit | eb3b956d2c9bfd86ca38ea5ce6343efcbacff641 (patch) | |
| tree | fa9c235c7ebcbaed036bba72849acc5f1c568758 /drivers/scsi/arcmsr | |
| parent | 4f1826b8e56ffb5c0b7243a7b573bb521b919dfb (diff) | |
| download | lwn-eb3b956d2c9bfd86ca38ea5ce6343efcbacff641.tar.gz lwn-eb3b956d2c9bfd86ca38ea5ce6343efcbacff641.zip | |
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>
Diffstat (limited to 'drivers/scsi/arcmsr')
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr_hba.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 7cfae1decd12..127fe50e6b12 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); |