-/**
- * zfcp_scsi_command_async - worker for zfcp_scsi_queuecommand and
- * zfcp_scsi_command_sync
- * @adapter: adapter where scsi command is issued
- * @unit: unit to which scsi command is sent
- * @scpnt: scsi command to be sent
- * @timer: timer to be started if request is successfully initiated
- *
- * Note: In scsi_done function must be set in scpnt.
- */
-int
-zfcp_scsi_command_async(struct zfcp_adapter *adapter, struct zfcp_unit *unit,
- struct scsi_cmnd *scpnt, int use_timer)
-{
- int tmp;
- int retval;
-
- retval = 0;
-
- BUG_ON((adapter == NULL) || (adapter != unit->port->adapter));
- BUG_ON(scpnt->scsi_done == NULL);
-
- if (unlikely(NULL == unit)) {
- zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
- goto out;
- }
-
- if (unlikely(
- atomic_test_mask(ZFCP_STATUS_COMMON_ERP_FAILED, &unit->status) ||
- !atomic_test_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status))) {
- zfcp_scsi_command_fail(scpnt, DID_ERROR);
- goto out;
- }
-
- tmp = zfcp_fsf_send_fcp_command_task(adapter, unit, scpnt, use_timer,
- ZFCP_REQ_AUTO_CLEANUP);
- if (unlikely(tmp == -EBUSY)) {
- zfcp_scsi_command_fail(scpnt, DID_NO_CONNECT);
- goto out;
- }
-
- if (unlikely(tmp < 0))
- retval = SCSI_MLQUEUE_HOST_BUSY;
-
-out:
- return retval;
-}
-
-static void
-zfcp_scsi_command_sync_handler(struct scsi_cmnd *scpnt)
-{
- struct completion *wait = (struct completion *) scpnt->SCp.ptr;
- complete(wait);
-}
-
-
-/**
- * zfcp_scsi_command_sync - send a SCSI command and wait for completion
- * @unit: unit where command is sent to
- * @scpnt: scsi command to be sent
- * @use_timer: indicates whether timer should be setup or not
- * Return: 0
- *
- * Errors are indicated in scpnt->result
- */
-int
-zfcp_scsi_command_sync(struct zfcp_unit *unit, struct scsi_cmnd *scpnt,
- int use_timer)
-{
- int ret;
- DECLARE_COMPLETION_ONSTACK(wait);
-
- scpnt->SCp.ptr = (void *) &wait; /* silent re-use */
- scpnt->scsi_done = zfcp_scsi_command_sync_handler;
- ret = zfcp_scsi_command_async(unit->port->adapter, unit, scpnt,
- use_timer);
- if (ret == 0)
- wait_for_completion(&wait);
-
- scpnt->SCp.ptr = NULL;
-
- return 0;
-}
-
-/*
- * function: zfcp_scsi_queuecommand
- *
- * purpose: enqueues a SCSI command to the specified target device
- *
- * returns: 0 - success, SCSI command enqueued
- * !0 - failure
- */
-static int
-zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
- void (*done) (struct scsi_cmnd *))