diff options
| author | Xiang Chen <chenxiang66@hisilicon.com> | 2018-07-18 16:14:31 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-07-20 03:57:40 +0200 |
| commit | 6cca51ee0aa2540d648ff8698c3889330d897f27 (patch) | |
| tree | 2994229e9dbeb32eb95d15770d957b9d049ae5a5 /drivers/scsi/hisi_sas | |
| parent | scsi: hisi_sas: Implement handlers of PCIe FLR for v3 hw (diff) | |
| download | linux-6cca51ee0aa2540d648ff8698c3889330d897f27.tar.xz linux-6cca51ee0aa2540d648ff8698c3889330d897f27.zip | |
scsi: hisi_sas: Tidy hisi_sas_task_prep()
To decrease the usage of spinlock during delivery IO, relocate some code in
hisi_sas_task_prep().
Also an invalid comment is removed.
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 | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index b0bcd142adc7..432a38a118b1 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -296,8 +296,8 @@ static int hisi_sas_task_prep(struct sas_task *task, 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; - unsigned long flags, flags_dq; struct hisi_sas_dq *dq; + unsigned long flags; int wr_q_index; if (!sas_port) { @@ -393,16 +393,17 @@ static int hisi_sas_task_prep(struct sas_task *task, slot = &hisi_hba->slot_info[slot_idx]; - spin_lock_irqsave(&dq->lock, flags_dq); + spin_lock_irqsave(&dq->lock, flags); wr_q_index = hisi_hba->hw->get_free_slot(hisi_hba, dq); if (wr_q_index < 0) { - spin_unlock_irqrestore(&dq->lock, flags_dq); + spin_unlock_irqrestore(&dq->lock, flags); rc = -EAGAIN; goto err_out_tag; } list_add_tail(&slot->delivery, &dq->list); - spin_unlock_irqrestore(&dq->lock, flags_dq); + list_add_tail(&slot->entry, &sas_dev->list); + spin_unlock_irqrestore(&dq->lock, flags); dlvry_queue = dq->id; dlvry_queue_slot = wr_q_index; @@ -440,9 +441,6 @@ static int hisi_sas_task_prep(struct sas_task *task, break; } - spin_lock_irqsave(&dq->lock, flags); - list_add_tail(&slot->entry, &sas_dev->list); - spin_unlock_irqrestore(&dq->lock, flags); spin_lock_irqsave(&task->task_state_lock, flags); task->task_state_flags |= SAS_TASK_AT_INITIATOR; spin_unlock_irqrestore(&task->task_state_lock, flags); @@ -818,7 +816,6 @@ static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task hisi_sas_slot_task_free(hisi_hba, task, slot); } -/* hisi_hba.lock should be locked */ static void hisi_sas_release_task(struct hisi_hba *hisi_hba, struct domain_device *device) { |