diff options
| author | Bart Van Assche | 2019-04-17 14:44:32 -0700 |
|---|---|---|
| committer | Martin K. Petersen | 2019-04-29 17:24:50 -0400 |
| commit | 1b1e68d2a940827725dbf666dd3e73ff12434b0c (patch) | |
| tree | 277ba0ac7aa13a1b340110379c26be9cd906ed84 /drivers/scsi | |
| parent | 4c374596d7eb80a901c8adc532ae9760e9df9fde (diff) | |
scsi: qla2xxx: Remove unnecessary locking from the target code
All callbacks from the target core into the qla2xxx driver and also all I/O
completion functions are serialized per command. Since .cmd_sent_to_fw and
.trc_flags are only modified from inside these functions it is not
necessary to protect it with locking. Remove the superfluous locking.
Cc: Himanshu Madhani <hmadhani@marvell.com>
Cc: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_target.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/qla2xxx/tcm_qla2xxx.c | 10 |
2 files changed, 1 insertions, 13 deletions
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 2a021548162f..dfacc42f1e1d 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -3387,9 +3387,7 @@ int qlt_xmit_response(struct qla_tgt_cmd *cmd, int xmit_type, cmd->state = QLA_TGT_STATE_PROCESSED; /* Mid-level is done processing */ - spin_lock(&cmd->cmd_lock); cmd->cmd_sent_to_fw = 1; - spin_unlock(&cmd->cmd_lock); cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags); /* Memory Barrier */ @@ -3470,9 +3468,7 @@ int qlt_rdy_to_xfer(struct qla_tgt_cmd *cmd) qlt_load_data_segments(&prm); cmd->state = QLA_TGT_STATE_NEED_DATA; - spin_lock(&cmd->cmd_lock); cmd->cmd_sent_to_fw = 1; - spin_unlock(&cmd->cmd_lock); cmd->ctio_flags = le16_to_cpu(pkt->u.status0.flags); /* Memory Barrier */ diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c index 701e8f891af5..ffcfca1e94b4 100644 --- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -261,17 +261,15 @@ static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) static void tcm_qla2xxx_complete_free(struct work_struct *work) { struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); - unsigned long flags; cmd->cmd_in_wq = 0; WARN_ON(cmd->trc_flags & TRC_CMD_FREE); - spin_lock_irqsave(&cmd->cmd_lock, flags); + /* To do: protect all tgt_counters manipulations with proper locking. */ cmd->qpair->tgt_counters.qla_core_ret_sta_ctio++; cmd->trc_flags |= TRC_CMD_FREE; cmd->cmd_sent_to_fw = 0; - spin_unlock_irqrestore(&cmd->cmd_lock, flags); transport_generic_free_cmd(&cmd->se_cmd, 0); } @@ -473,24 +471,18 @@ static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd, static void tcm_qla2xxx_handle_data_work(struct work_struct *work) { struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); - unsigned long flags; /* * Ensure that the complete FCP WRITE payload has been received. * Otherwise return an exception via CHECK_CONDITION status. */ cmd->cmd_in_wq = 0; - - spin_lock_irqsave(&cmd->cmd_lock, flags); cmd->cmd_sent_to_fw = 0; if (cmd->aborted) { - spin_unlock_irqrestore(&cmd->cmd_lock, flags); - transport_generic_request_failure(&cmd->se_cmd, TCM_CHECK_CONDITION_ABORT_CMD); return; } - spin_unlock_irqrestore(&cmd->cmd_lock, flags); cmd->qpair->tgt_counters.qla_core_ret_ctio++; if (!cmd->write_data_transferred) { |