From: Hannes Reinecke <hare@suse.de>
Date: Fri, 28 Feb 2020 08:53:18 +0100
Subject: scsi: core: Remove cmd_list functionality
Git-commit: c5a9707672fe22865d90fc04ac2fbc4f812666f3
Patch-mainline: v5.7-rc1
References: jsc#SLE-15152

Remove cmd_list functionality; no users left.  With that the
scsi_put_command() becomes empty, so remove that one, too.

Link: https://lore.kernel.org/r/20200228075318.91255-14-hare@suse.de
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart van Assche <bvanassche@acm.org>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/scsi.c        |   14 --------------
 drivers/scsi/scsi_error.c  |    1 -
 drivers/scsi/scsi_lib.c    |   31 -------------------------------
 drivers/scsi/scsi_priv.h   |    2 --
 drivers/scsi/scsi_scan.c   |    1 -
 include/scsi/scsi_cmnd.h   |    1 -
 include/scsi/scsi_device.h |    1 -
 include/scsi/scsi_host.h   |    2 --
 8 files changed, 53 deletions(-)

--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -94,20 +94,6 @@ EXPORT_SYMBOL(scsi_logging_level);
 ASYNC_DOMAIN_EXCLUSIVE(scsi_sd_pm_domain);
 EXPORT_SYMBOL(scsi_sd_pm_domain);
 
-/**
- * scsi_put_command - Free a scsi command block
- * @cmd: command block to free
- *
- * Returns:	Nothing.
- *
- * Notes:	The command must not belong to any lists.
- */
-void scsi_put_command(struct scsi_cmnd *cmd)
-{
-	scsi_del_cmd_from_list(cmd);
-	BUG_ON(delayed_work_pending(&cmd->abort_work));
-}
-
 #ifdef CONFIG_SCSI_LOGGING
 void scsi_log_send(struct scsi_cmnd *cmd)
 {
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -2412,7 +2412,6 @@ scsi_ioctl_reset(struct scsi_device *dev
 	wake_up(&shost->host_wait);
 	scsi_run_host_queues(shost);
 
-	scsi_put_command(scmd);
 	kfree(rq);
 
 out_put_autopm_host:
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -565,7 +565,6 @@ static void scsi_mq_uninit_cmd(struct sc
 {
 	scsi_mq_free_sgtables(cmd);
 	scsi_uninit_cmd(cmd);
-	scsi_del_cmd_from_list(cmd);
 }
 
 /* Returns false when no more bytes to process, true if there are more */
@@ -1101,35 +1100,6 @@ static void scsi_cleanup_rq(struct reque
 	}
 }
 
-/* Add a command to the list used by the aacraid and dpt_i2o drivers */
-void scsi_add_cmd_to_list(struct scsi_cmnd *cmd)
-{
-	struct scsi_device *sdev = cmd->device;
-	struct Scsi_Host *shost = sdev->host;
-	unsigned long flags;
-
-	if (shost->use_cmd_list) {
-		spin_lock_irqsave(&sdev->list_lock, flags);
-		list_add_tail(&cmd->list, &sdev->cmd_list);
-		spin_unlock_irqrestore(&sdev->list_lock, flags);
-	}
-}
-
-/* Remove a command from the list used by the aacraid and dpt_i2o drivers */
-void scsi_del_cmd_from_list(struct scsi_cmnd *cmd)
-{
-	struct scsi_device *sdev = cmd->device;
-	struct Scsi_Host *shost = sdev->host;
-	unsigned long flags;
-
-	if (shost->use_cmd_list) {
-		spin_lock_irqsave(&sdev->list_lock, flags);
-		BUG_ON(list_empty(&cmd->list));
-		list_del_init(&cmd->list);
-		spin_unlock_irqrestore(&sdev->list_lock, flags);
-	}
-}
-
 /* Called after a request has been started. */
 void scsi_init_command(struct scsi_device *dev, struct scsi_cmnd *cmd)
 {
@@ -1159,7 +1129,6 @@ void scsi_init_command(struct scsi_devic
 	cmd->jiffies_at_alloc = jiffies_at_alloc;
 	cmd->retries = retries;
 
-	scsi_add_cmd_to_list(cmd);
 }
 
 static blk_status_t scsi_setup_scsi_cmnd(struct scsi_device *sdev,
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -84,8 +84,6 @@ int scsi_eh_get_sense(struct list_head *
 int scsi_noretry_cmd(struct scsi_cmnd *scmd);
 
 /* scsi_lib.c */
-extern void scsi_add_cmd_to_list(struct scsi_cmnd *cmd);
-extern void scsi_del_cmd_from_list(struct scsi_cmnd *cmd);
 extern int scsi_maybe_unblock_host(struct scsi_device *sdev);
 extern void scsi_device_unbusy(struct scsi_device *sdev);
 extern void scsi_queue_insert(struct scsi_cmnd *cmd, int reason);
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -236,7 +236,6 @@ static struct scsi_device *scsi_alloc_sd
 	sdev->sdev_state = SDEV_CREATED;
 	INIT_LIST_HEAD(&sdev->siblings);
 	INIT_LIST_HEAD(&sdev->same_target_siblings);
-	INIT_LIST_HEAD(&sdev->cmd_list);
 	INIT_LIST_HEAD(&sdev->starved_entry);
 	INIT_LIST_HEAD(&sdev->event_list);
 	spin_lock_init(&sdev->list_lock);
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -158,7 +158,6 @@ static inline struct scsi_driver *scsi_c
 	return *(struct scsi_driver **)cmd->request->rq_disk->private_data;
 }
 
-extern void scsi_put_command(struct scsi_cmnd *);
 extern void scsi_finish_command(struct scsi_cmnd *cmd);
 
 extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count,
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -110,7 +110,6 @@ struct scsi_device {
 	atomic_t device_blocked;	/* Device returned QUEUE_FULL. */
 
 	spinlock_t list_lock;
-	struct list_head cmd_list;	/* queue of in use SCSI Command structures */
 	struct list_head starved_entry;
 	unsigned short queue_depth;	/* How deep of a queue we want */
 	unsigned short max_queue_depth;	/* max queue depth */
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -638,8 +638,6 @@ struct Scsi_Host {
 	/* The controller does not support WRITE SAME */
 	unsigned no_write_same:1;
 
-	unsigned use_cmd_list:1;
-
 	/* Host responded with short (<36 bytes) INQUIRY result */
 	unsigned short_inquiry:1;