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| author |   Xiang Chen <chenxiang66@hisilicon.com> | 2018-11-09 22:06:35 +0800 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2018-11-15 14:37:05 -0500 |
| commit | 745b6847634c11dda1079d0290781a443eddb4b7 (patch) | |
| tree | 8f4af7c00328116c1851b3fd74061d6a06a02182 /drivers/scsi/hisi_sas | |
| parent | scsi: hisi_sas: Add support for interrupt coalescing for v3 hw (diff) | |
| download | linux-dev-745b6847634c11dda1079d0290781a443eddb4b7.tar.xz linux-dev-745b6847634c11dda1079d0290781a443eddb4b7.zip | |
scsi: hisi_sas: Relocate some codes to avoid an unused check
In function hisi_sas_task_prep(), we check asd_sas_port, but in function
hisi_sas_task_exec(), we already refer to asd_sas_port by using function
dev_to_hisi_hba() implicitly. So to avoid this possible invalid
dereference, relocate the check to function hisi_sas_task_prep().
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>
Diffstat (limited to 'drivers/scsi/hisi_sas')
| -rw-r--r-- | drivers/scsi/hisi_sas/hisi_sas_main.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 8633ff9335d1..65dc74957999 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -302,36 +302,19 @@ static int hisi_sas_task_prep(struct sas_task *task, int *pass) { struct domain_device *device = task->dev; - struct hisi_hba *hisi_hba; + struct hisi_hba *hisi_hba = dev_to_hisi_hba(device); 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; + struct device *dev = hisi_hba->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; unsigned long flags; int wr_q_index; - if (!sas_port) { - struct task_status_struct *ts = &task->task_status; - - ts->resp = SAS_TASK_UNDELIVERED; - ts->stat = SAS_PHY_DOWN; - /* - * libsas will use dev->port, should - * not call task_done for sata - */ - if (device->dev_type != SAS_SATA_DEV) - task->task_done(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", @@ -506,10 +489,29 @@ static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags, u32 rc; u32 pass = 0; unsigned long flags; - struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev); - struct device *dev = hisi_hba->dev; + struct hisi_hba *hisi_hba; + struct device *dev; + struct domain_device *device = task->dev; + struct asd_sas_port *sas_port = device->port; struct hisi_sas_dq *dq = NULL; + if (!sas_port) { + struct task_status_struct *ts = &task->task_status; + + ts->resp = SAS_TASK_UNDELIVERED; + ts->stat = SAS_PHY_DOWN; + /* + * libsas will use dev->port, should + * not call task_done for sata + */ + if (device->dev_type != SAS_SATA_DEV) + task->task_done(task); + return -ECOMM; + } + + hisi_hba = dev_to_hisi_hba(device); + dev = hisi_hba->dev; + if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags))) { if (in_softirq()) return -EINVAL; |