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authorXiaofei Tan <tanxiaofei@huawei.com>2017-10-24 18:51:37 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2017-10-25 15:21:04 +0300
commit378c233bcb21dfb2d9c2548b9a1fa6a8d35c78dd (patch)
tree892ddfb22823048e863e3db962e88ccd7f875c59 /drivers/scsi/hisi_sas
parent1eb8eeac17ee808b50b422f5ef2e27f5497f82ad (diff)
downloadlinux-378c233bcb21dfb2d9c2548b9a1fa6a8d35c78dd.tar.xz
scsi: hisi_sas: fix NULL check in SMP abort task path
This patch adds a NULL check of task->lldd_task before freeing the slot in SMP path. This is to guard against the scenario of the slot being freed during the from the preceding internal abort. Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/hisi_sas')
-rw-r--r--drivers/scsi/hisi_sas/hisi_sas_main.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 88d90dc14adf..2a209e1ea76b 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1161,7 +1161,7 @@ static int hisi_sas_abort_task(struct sas_task *task)
rc = hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_CMD, tag);
- if (rc == TMF_RESP_FUNC_FAILED) {
+ if (rc == TMF_RESP_FUNC_FAILED && task->lldd_task) {
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_do_release_task(hisi_hba, task, slot);
spin_unlock_irqrestore(&hisi_hba->lock, flags);