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| author | Luo Jiaxing <luojiaxing@huawei.com> | 2018-09-24 23:06:29 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-10-16 00:27:04 -0400 |
| commit | 1668e3b6f8f8ed2ce685691c92b90dfadeaa3f2f (patch) | |
| tree | 7e7377c370dabeb8c0afbeedbd981991820deec0 | |
| parent | 5a54691f874ab29ec82f08bc6936866a3ccdaa91 (diff) | |
| download | blackbird-op-linux-1668e3b6f8f8ed2ce685691c92b90dfadeaa3f2f.tar.gz blackbird-op-linux-1668e3b6f8f8ed2ce685691c92b90dfadeaa3f2f.zip | |
scsi: hisi_sas: Move evaluation of hisi_hba in hisi_sas_task_prep()
In evaluating hisi_hba, the sas_port may be NULL, so for safety relocate
the the check to value possible NULL deference.
Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas_main.c | 7 |
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 791787b814de..a0843110abd8 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -287,13 +287,13 @@ static int hisi_sas_task_prep(struct sas_task *task, int *pass) { struct domain_device *device = task->dev; - struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); + struct hisi_hba *hisi_hba; struct hisi_sas_device *sas_dev = device->lldd_dev; struct hisi_sas_port *port; struct hisi_sas_slot *slot; struct hisi_sas_cmd_hdr *cmd_hdr_base; struct asd_sas_port *sas_port = device->port; - struct device *dev = hisi_hba->dev; + struct device *dev; int dlvry_queue_slot, dlvry_queue, rc, slot_idx; int n_elem = 0, n_elem_req = 0, n_elem_resp = 0; struct hisi_sas_dq *dq; @@ -314,6 +314,9 @@ static int hisi_sas_task_prep(struct sas_task *task, return -ECOMM; } + hisi_hba = dev_to_hisi_hba(device); + dev = hisi_hba->dev; + if (DEV_IS_GONE(sas_dev)) { if (sas_dev) dev_info(dev, "task prep: device %d not ready\n", |
