scsi: libsas: Delete sas_ssp_task.enable_first_burst

Since libsas was introduced in commit 2908d778 ("[SCSI] aic94xx: new
driver"), sas_ssp_task.enable_first_burst is never set, so delete it and
any references.
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://lore.kernel.org/r/20230815115156.343535-7-john.g.garry@oracle.comReviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/aic94xx/aic94xx_task.c

@@ -485,8 +485,6 @@ static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
 	scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
 
 	memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
-	if (task->ssp_task.enable_first_burst)
-		scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
 	scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
 	scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
 	memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd,

drivers/scsi/hisi_sas/hisi_sas_v1_hw.c

@@ -960,7 +960,7 @@ static void prep_ssp_v1_hw(struct hisi_hba *hisi_hba,
 	struct scsi_cmnd *scsi_cmnd = ssp_task->cmd;
 	struct sas_tmf_task *tmf = slot->tmf;
 	int has_data = 0, priority = !!tmf;
-	u8 *buf_cmd, fburst = 0;
+	u8 *buf_cmd;
 	u32 dw1, dw2;
 
 	/* create header */
@@ -1018,15 +1018,11 @@ static void prep_ssp_v1_hw(struct hisi_hba *hisi_hba,
 
 	buf_cmd = hisi_sas_cmd_hdr_addr_mem(slot) +
 		sizeof(struct ssp_frame_hdr);
-	if (task->ssp_task.enable_first_burst) {
-		fburst = (1 << 7);
-		dw2 |= 1 << CMD_HDR_FIRST_BURST_OFF;
-	}
 	hdr->dw2 = cpu_to_le32(dw2);
 
 	memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 	if (!tmf) {
-		buf_cmd[9] = fburst | task->ssp_task.task_attr |
+		buf_cmd[9] = task->ssp_task.task_attr |
 				(task->ssp_task.task_prio << 3);
 		memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
 				task->ssp_task.cmd->cmd_len);

drivers/scsi/mvsas/mv_sas.c

@@ -564,7 +564,7 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi,
 	void *buf_prd;
 	struct ssp_frame_hdr *ssp_hdr;
 	void *buf_tmp;
-	u8 *buf_cmd, *buf_oaf, fburst = 0;
+	u8 *buf_cmd, *buf_oaf;
 	dma_addr_t buf_tmp_dma;
 	u32 flags;
 	u32 resp_len, req_len, i, tag = tei->tag;
@@ -582,10 +582,6 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi,
 				(phy_mask << TXQ_PHY_SHIFT));
 
 	flags = MCH_RETRY;
-	if (task->ssp_task.enable_first_burst) {
-		flags |= MCH_FBURST;
-		fburst = (1 << 7);
-	}
 	if (is_tmf)
 		flags |= (MCH_SSP_FR_TASK << MCH_SSP_FR_TYPE_SHIFT);
 	else
@@ -667,7 +663,7 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi,
 	memcpy(buf_cmd, &task->ssp_task.LUN, 8);
 
 	if (ssp_hdr->frame_type != SSP_TASK) {
-		buf_cmd[9] = fburst | task->ssp_task.task_attr |
+		buf_cmd[9] = task->ssp_task.task_attr |
 				(task->ssp_task.task_prio << 3);
 		memcpy(buf_cmd + 12, task->ssp_task.cmd->cmnd,
 		       task->ssp_task.cmd->cmd_len);

drivers/scsi/pm8001/pm8001_hwi.c

@@ -4053,8 +4053,6 @@ static int pm8001_chip_ssp_io_req(struct pm8001_hba_info *pm8001_ha,
 	ssp_cmd.data_len = cpu_to_le32(task->total_xfer_len);
 	ssp_cmd.device_id = cpu_to_le32(pm8001_dev->device_id);
 	ssp_cmd.tag = cpu_to_le32(tag);
-	if (task->ssp_task.enable_first_burst)
-		ssp_cmd.ssp_iu.efb_prio_attr |= 0x80;
 	ssp_cmd.ssp_iu.efb_prio_attr |= (task->ssp_task.task_prio << 3);
 	ssp_cmd.ssp_iu.efb_prio_attr |= (task->ssp_task.task_attr & 7);
 	memcpy(ssp_cmd.ssp_iu.cdb, task->ssp_task.cmd->cmnd,

drivers/scsi/pm8001/pm80xx_hwi.c

@@ -4316,8 +4316,6 @@ static int pm80xx_chip_ssp_io_req(struct pm8001_hba_info *pm8001_ha,
 	ssp_cmd.data_len = cpu_to_le32(task->total_xfer_len);
 	ssp_cmd.device_id = cpu_to_le32(pm8001_dev->device_id);
 	ssp_cmd.tag = cpu_to_le32(tag);
-	if (task->ssp_task.enable_first_burst)
-		ssp_cmd.ssp_iu.efb_prio_attr = 0x80;
 	ssp_cmd.ssp_iu.efb_prio_attr |= (task->ssp_task.task_prio << 3);
 	ssp_cmd.ssp_iu.efb_prio_attr |= (task->ssp_task.task_attr & 7);
 	memcpy(ssp_cmd.ssp_iu.cdb, task->ssp_task.cmd->cmnd,

include/scsi/libsas.h

@@ -564,7 +564,6 @@ enum task_attribute {
 
 struct sas_ssp_task {
 	u8     LUN[8];
-	u8     enable_first_burst:1;
 	enum   task_attribute task_attr;
 	u8     task_prio;
 	struct scsi_cmnd *cmd;