linux-kernel - [PATCH v3 2/7] scsi: hisi_sas: Use sas_task_find

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Message-ID: <1664882833-39804-3-git-send-email-john.garry@huawei.com>
Date:   Tue, 4 Oct 2022 19:27:08 +0800
From:   John Garry <john.garry@...wei.com>
To:     <jinpu.wang@...ud.ionos.com>, <jejb@...ux.ibm.com>,
        <martin.petersen@...cle.com>
CC:     <hare@...e.de>, <damien.lemoal@...nsource.wdc.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <ipylypiv@...gle.com>,
        <changyuanl@...gle.com>, <yanaijie@...wei.com>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH v3 2/7] scsi: hisi_sas: Use sas_task_find_rq()

Use sas_task_find_rq() to lookup the request per task for its driver tag.

Signed-off-by: John Garry <john.garry@...wei.com>
Reviewed-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Reviewed-by: Hannes Reinecke <hare@...e.de>
---
 drivers/scsi/hisi_sas/hisi_sas_main.c | 26 ++++++++------------------
 1 file changed, 8 insertions(+), 18 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 4c37ae9eb6b6..1011dffed51f 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -177,13 +177,13 @@ static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
 }
 
 static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba,
-				     struct scsi_cmnd *scsi_cmnd)
+				     struct request *rq)
 {
 	int index;
 	void *bitmap = hisi_hba->slot_index_tags;
 
-	if (scsi_cmnd)
-		return scsi_cmd_to_rq(scsi_cmnd)->tag;
+	if (rq)
+		return rq->tag;
 
 	spin_lock(&hisi_hba->lock);
 	index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count,
@@ -461,11 +461,11 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 	struct asd_sas_port *sas_port = device->port;
 	struct hisi_sas_device *sas_dev = device->lldd_dev;
 	bool internal_abort = sas_is_internal_abort(task);
-	struct scsi_cmnd *scmd = NULL;
 	struct hisi_sas_dq *dq = NULL;
 	struct hisi_sas_port *port;
 	struct hisi_hba *hisi_hba;
 	struct hisi_sas_slot *slot;
+	struct request *rq = NULL;
 	struct device *dev;
 	int rc;
 
@@ -520,22 +520,12 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 				return -ECOMM;
 		}
 
-		if (task->uldd_task) {
-			struct ata_queued_cmd *qc;
-
-			if (dev_is_sata(device)) {
-				qc = task->uldd_task;
-				scmd = qc->scsicmd;
-			} else {
-				scmd = task->uldd_task;
-			}
-		}
-
-		if (scmd) {
+		rq = sas_task_find_rq(task);
+		if (rq) {
 			unsigned int dq_index;
 			u32 blk_tag;
 
-			blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd));
+			blk_tag = blk_mq_unique_tag(rq);
 			dq_index = blk_mq_unique_tag_to_hwq(blk_tag);
 			dq = &hisi_hba->dq[dq_index];
 		} else {
@@ -580,7 +570,7 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
 	if (!internal_abort && hisi_hba->hw->slot_index_alloc)
 		rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device);
 	else
-		rc = hisi_sas_slot_index_alloc(hisi_hba, scmd);
+		rc = hisi_sas_slot_index_alloc(hisi_hba, rq);
 
 	if (rc < 0)
 		goto err_out_dif_dma_unmap;
-- 
2.25.1