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scsi: hisi_sas: Check sas_port before using it 

Need to check the structure sas_port before using it.

Link: https://lore.kernel.org/r/1573551059-107873-2-git-send-email-john.garry@huawei.com
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Xiang Chen 2019-11-12 17:30:56 +08:00 committed by Martin K. Petersen
parent 3b294c0fb9
commit 8c39673d54
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/hisi_sas/hisi_sas_main.c
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@ -974,12 +974,13 @@ static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
struct hisi_sas_phy *phy = sas_phy->lldd_phy;
struct asd_sas_port *sas_port = sas_phy->port;
struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
struct hisi_sas_port *port;
unsigned long flags;
if (!sas_port)
return;
port = to_hisi_sas_port(sas_port);
spin_lock_irqsave(&hisi_hba->lock, flags);
port->port_attached = 1;
port->id = phy->port_id;