linux-kernel - [PATCH RFC v2 21/24] dpt_i2o: drop cmd

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Date:   Wed, 11 Mar 2020 00:25:47 +0800
From:   John Garry <john.garry@...wei.com>
To:     <axboe@...nel.dk>, <jejb@...ux.ibm.com>,
        <martin.petersen@...cle.com>, <hare@...e.de>,
        <ming.lei@...hat.com>, <bvanassche@....org>, <hch@...radead.org>
CC:     <linux-block@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-scsi@...r.kernel.org>,
        <virtualization@...ts.linux-foundation.org>,
        <esc.storagedev@...rosemi.com>, <chenxiang66@...ilicon.com>,
        Hannes Reinecke <hare@...e.com>
Subject: [PATCH RFC v2 21/24] dpt_i2o: drop cmd_list usage

From: Hannes Reinecke <hare@...e.com>

Now each command has a unique tag, so we can drop the legacy 'cmd_list'
usage and rely on the tag to identify the command.

Signed-off-by: Hannes Reinecke <hare@...e.com>
---
 drivers/scsi/dpt_i2o.c | 23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

diff --git a/drivers/scsi/dpt_i2o.c b/drivers/scsi/dpt_i2o.c
index abc74fd474dc..4c7305bf6b57 100644
--- a/drivers/scsi/dpt_i2o.c
+++ b/drivers/scsi/dpt_i2o.c
@@ -2335,7 +2335,6 @@ static s32 adpt_scsi_host_alloc(adpt_hba* pHba, struct scsi_host_template *sht)
 	host->unique_id = (u32)sys_tbl_pa + pHba->unit;
 	host->sg_tablesize = pHba->sg_tablesize;
 	host->can_queue = pHba->post_fifo_size;
-	host->use_cmd_list = 1;
 
 	return 0;
 }
@@ -2647,20 +2646,18 @@ static s32 adpt_i2o_reparse_lct(adpt_hba* pHba)
 	return 0;
 }
 
-static void adpt_fail_posted_scbs(adpt_hba* pHba)
+static bool adpt_fail_posted_scbs_iter(struct request *req, void *data, bool reserved)
 {
-	struct scsi_cmnd* 	cmd = NULL;
-	struct scsi_device* 	d = NULL;
+	struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(req);
 
-	shost_for_each_device(d, pHba->host) {
-		unsigned long flags;
-		spin_lock_irqsave(&d->list_lock, flags);
-		list_for_each_entry(cmd, &d->cmd_list, list) {
-			cmd->result = (DID_OK << 16) | (QUEUE_FULL <<1);
-			cmd->scsi_done(cmd);
-		}
-		spin_unlock_irqrestore(&d->list_lock, flags);
-	}
+	cmd->result = (DID_OK << 16) | (QUEUE_FULL <<1);
+	cmd->scsi_done(cmd);
+	return true;
+}
+
+static void adpt_fail_posted_scbs(adpt_hba* pHba)
+{
+	blk_mq_tagset_busy_iter(&pHba->host->tag_set, adpt_fail_posted_scbs_iter, NULL);
 }
 
 
-- 
2.17.1