From 6934be4f016311cf88c316dad5c75e4ccf8a7fc0 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 19 Jun 2017 14:27:24 +0200 Subject: [PATCH] scsi: scsi_dh_alua: remove synchronous STPG support Since 9c58b395 ("scsi: scsi_devinfo: remove synchronous ALUA for NETAPP devices") this code is unused. Signed-off-by: Christoph Hellwig Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen --- drivers/scsi/device_handler/scsi_dh_alua.c | 27 ++++------------------ include/scsi/scsi_device.h | 1 - 2 files changed, 5 insertions(+), 23 deletions(-) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index c01b47e5b55a..0962fd544401 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -57,7 +57,6 @@ /* device handler flags */ #define ALUA_OPTIMIZE_STPG 0x01 #define ALUA_RTPG_EXT_HDR_UNSUPP 0x02 -#define ALUA_SYNC_STPG 0x04 /* State machine flags */ #define ALUA_PG_RUN_RTPG 0x10 #define ALUA_PG_RUN_STPG 0x20 @@ -70,7 +69,6 @@ MODULE_PARM_DESC(optimize_stpg, "Allow use of a non-optimized path, rather than static LIST_HEAD(port_group_list); static DEFINE_SPINLOCK(port_group_lock); static struct workqueue_struct *kaluad_wq; -static struct workqueue_struct *kaluad_sync_wq; struct alua_port_group { struct kref kref; @@ -380,8 +378,6 @@ static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h, } spin_lock_irqsave(&pg->lock, flags); - if (sdev->synchronous_alua) - pg->flags |= ALUA_SYNC_STPG; if (pg_updated) list_add_rcu(&h->node, &pg->dh_list); spin_unlock_irqrestore(&pg->lock, flags); @@ -785,7 +781,6 @@ static void alua_rtpg_work(struct work_struct *work) int err = SCSI_DH_OK; struct alua_queue_data *qdata, *tmp; unsigned long flags; - struct workqueue_struct *alua_wq = kaluad_wq; spin_lock_irqsave(&pg->lock, flags); sdev = pg->rtpg_sdev; @@ -796,8 +791,6 @@ static void alua_rtpg_work(struct work_struct *work) kref_put(&pg->kref, release_port_group); return; } - if (pg->flags & ALUA_SYNC_STPG) - alua_wq = kaluad_sync_wq; pg->flags |= ALUA_PG_RUNNING; if (pg->flags & ALUA_PG_RUN_RTPG) { int state = pg->state; @@ -810,7 +803,7 @@ static void alua_rtpg_work(struct work_struct *work) pg->flags &= ~ALUA_PG_RUNNING; pg->flags |= ALUA_PG_RUN_RTPG; spin_unlock_irqrestore(&pg->lock, flags); - queue_delayed_work(alua_wq, &pg->rtpg_work, + queue_delayed_work(kaluad_wq, &pg->rtpg_work, pg->interval * HZ); return; } @@ -822,7 +815,7 @@ static void alua_rtpg_work(struct work_struct *work) pg->flags &= ~ALUA_PG_RUNNING; pg->flags |= ALUA_PG_RUN_RTPG; spin_unlock_irqrestore(&pg->lock, flags); - queue_delayed_work(alua_wq, &pg->rtpg_work, + queue_delayed_work(kaluad_wq, &pg->rtpg_work, pg->interval * HZ); return; } @@ -839,7 +832,7 @@ static void alua_rtpg_work(struct work_struct *work) pg->interval = 0; pg->flags &= ~ALUA_PG_RUNNING; spin_unlock_irqrestore(&pg->lock, flags); - queue_delayed_work(alua_wq, &pg->rtpg_work, + queue_delayed_work(kaluad_wq, &pg->rtpg_work, pg->interval * HZ); return; } @@ -874,8 +867,6 @@ static bool alua_rtpg_queue(struct alua_port_group *pg, { int start_queue = 0; unsigned long flags; - struct workqueue_struct *alua_wq = kaluad_wq; - if (WARN_ON_ONCE(!pg) || scsi_device_get(sdev)) return false; @@ -900,12 +891,10 @@ static bool alua_rtpg_queue(struct alua_port_group *pg, } } - if (pg->flags & ALUA_SYNC_STPG) - alua_wq = kaluad_sync_wq; spin_unlock_irqrestore(&pg->lock, flags); if (start_queue) { - if (queue_delayed_work(alua_wq, &pg->rtpg_work, + if (queue_delayed_work(kaluad_wq, &pg->rtpg_work, msecs_to_jiffies(ALUA_RTPG_DELAY_MSECS))) sdev = NULL; else @@ -1166,16 +1155,11 @@ static int __init alua_init(void) /* Temporary failure, bypass */ return SCSI_DH_DEV_TEMP_BUSY; } - kaluad_sync_wq = create_workqueue("kaluad_sync"); - if (!kaluad_sync_wq) { - destroy_workqueue(kaluad_wq); - return SCSI_DH_DEV_TEMP_BUSY; - } + r = scsi_register_device_handler(&alua_dh); if (r != 0) { printk(KERN_ERR "%s: Failed to register scsi device handler", ALUA_DH_NAME); - destroy_workqueue(kaluad_sync_wq); destroy_workqueue(kaluad_wq); } return r; @@ -1184,7 +1168,6 @@ static int __init alua_init(void) static void __exit alua_exit(void) { scsi_unregister_device_handler(&alua_dh); - destroy_workqueue(kaluad_sync_wq); destroy_workqueue(kaluad_wq); } diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index d13bc80825b1..d3fb98f72a03 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -181,7 +181,6 @@ struct scsi_device { unsigned no_dif:1; /* T10 PI (DIF) should be disabled */ unsigned broken_fua:1; /* Don't set FUA bit */ unsigned lun_in_cdb:1; /* Store LUN bits in CDB[1] */ - unsigned synchronous_alua:1; /* Synchronous ALUA commands */ atomic_t disk_events_disable_depth; /* disable depth for disk events */ -- 2.20.1