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authorYihang Li <liyihang9@huawei.com>2023-12-14 11:45:14 +0800
committerMartin K. Petersen <martin.petersen@oracle.com>2023-12-13 23:24:54 -0500
commit8dd10296be8562a45c6c6794dd492a2b7dccede8 (patch)
tree2761d468e3d926814d6ba8ce6cabc5f984f1c6d9 /drivers/scsi/hisi_sas/hisi_sas_main.c
parentd34ee535705eb43885bc0f561c63046f697355ad (diff)
scsi: hisi_sas: Check before using pointer variables
In commit 4b329abc9180 ("scsi: hisi_sas: Move slot variable definition in hisi_sas_abort_task()"), we move the variables slot to the function head. However, the variable slot may be NULL, we should check it in each branch. Fixes: 4b329abc9180 ("scsi: hisi_sas: Move slot variable definition in hisi_sas_abort_task()") Signed-off-by: Yihang Li <liyihang9@huawei.com> Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Link: https://lore.kernel.org/r/1702525516-51258-4-git-send-email-chenxiang66@hisilicon.com Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hisi_sas/hisi_sas_main.c')
-rw-r--r--drivers/scsi/hisi_sas/hisi_sas_main.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 16017064e96a..bbb7b2d9ffcf 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1641,7 +1641,10 @@ static int hisi_sas_abort_task(struct sas_task *task)
task->task_state_flags |= SAS_TASK_STATE_ABORTED;
spin_unlock_irqrestore(&task->task_state_lock, flags);
- if (slot && task->task_proto & SAS_PROTOCOL_SSP) {
+ if (!slot)
+ goto out;
+
+ if (task->task_proto & SAS_PROTOCOL_SSP) {
u16 tag = slot->idx;
int rc2;
@@ -1688,7 +1691,7 @@ static int hisi_sas_abort_task(struct sas_task *task)
rc = hisi_sas_softreset_ata_disk(device);
}
}
- } else if (slot && task->task_proto & SAS_PROTOCOL_SMP) {
+ } else if (task->task_proto & SAS_PROTOCOL_SMP) {
/* SMP */
u32 tag = slot->idx;
struct hisi_sas_cq *cq = &hisi_hba->cq[slot->dlvry_queue];