Merge remote-tracking branch 'scsi-queue/drivers-for-3.19' into for-linus

Conflicts:
	drivers/scsi/scsi_debug.c

Agreed and tested resolution to a merge problem between a fix in scsi_debug
and a driver update

Signed-off-by: James Bottomley <JBottomley@Parallels.com>

5 files changed, 10 insertions, 27 deletions

diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 2e0cf568a9c1..93d14daf0994 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -1105,7 +1105,6 @@ int fc_eh_abort(struct scsi_cmnd *);
 int fc_eh_device_reset(struct scsi_cmnd *);
 int fc_eh_host_reset(struct scsi_cmnd *);
 int fc_slave_alloc(struct scsi_device *);
-int fc_change_queue_depth(struct scsi_device *, int qdepth, int reason);
 
 /*
  * ELS/CT interface
diff --git a/include/scsi/libiscsi.h b/include/scsi/libiscsi.h
index 728c9ad9feb0..4d1c46aac331 100644
--- a/include/scsi/libiscsi.h
+++ b/include/scsi/libiscsi.h
@@ -378,8 +378,6 @@ struct iscsi_host {
 /*
  * scsi host template
  */
-extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth,
-                                    int reason);
 extern int iscsi_eh_abort(struct scsi_cmnd *sc);
 extern int iscsi_eh_recover_target(struct scsi_cmnd *sc);
 extern int iscsi_eh_session_reset(struct scsi_cmnd *sc);
diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h
index ef7872c20da9..832dcc9f86ec 100644
--- a/include/scsi/libsas.h
+++ b/include/scsi/libsas.h
@@ -365,12 +365,6 @@ struct asd_sas_phy {
 struct scsi_core {
         struct Scsi_Host *shost;
 
-        struct mutex      task_queue_flush;
-        spinlock_t        task_queue_lock;
-        struct list_head  task_queue;
-        int               task_queue_size;
-
-        struct task_struct *queue_thread;
 };
 
 struct sas_ha_event {
@@ -422,9 +416,6 @@ struct sas_ha_struct {
         struct asd_sas_port **sas_port; /* array of valid pointers, must be set */
         int             num_phys; /* must be set, gt 0, static */
 
-        /* The class calls this to send a task for execution. */
-        int lldd_max_execute_num;
-        int lldd_queue_size;
         int strict_wide_ports; /* both sas_addr and attached_sas_addr must match
                                 * their siblings when forming wide ports */
 
@@ -612,7 +603,6 @@ struct sas_ssp_task {
 
 struct sas_task {
         struct domain_device *dev;
-        struct list_head      list;
 
         spinlock_t   task_state_lock;
         unsigned     task_state_flags;
@@ -665,8 +655,7 @@ struct sas_domain_function_template {
         int  (*lldd_dev_found)(struct domain_device *);
         void (*lldd_dev_gone)(struct domain_device *);
 
-        int (*lldd_execute_task)(struct sas_task *, int num,
-                                 gfp_t gfp_flags);
+        int (*lldd_execute_task)(struct sas_task *, gfp_t gfp_flags);
 
         /* Task Management Functions. Must be called from process context. */
         int (*lldd_abort_task)(struct sas_task *);
@@ -700,12 +689,10 @@ extern void sas_suspend_ha(struct sas_ha_struct *sas_ha);
 int sas_set_phy_speed(struct sas_phy *phy,
                       struct sas_phy_linkrates *rates);
 int sas_phy_reset(struct sas_phy *phy, int hard_reset);
-int sas_queue_up(struct sas_task *task);
 extern int sas_queuecommand(struct Scsi_Host * ,struct scsi_cmnd *);
 extern int sas_target_alloc(struct scsi_target *);
 extern int sas_slave_configure(struct scsi_device *);
-extern int sas_change_queue_depth(struct scsi_device *, int new_depth,
-                                  int reason);
+extern int sas_change_queue_depth(struct scsi_device *, int new_depth);
 extern int sas_change_queue_type(struct scsi_device *, int qt);
 extern int sas_bios_param(struct scsi_device *,
                           struct block_device *,
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 0aeaa003c3c1..6364e23454dd 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -380,7 +380,7 @@ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *,
 #define __shost_for_each_device(sdev, shost) \
         list_for_each_entry((sdev), &((shost)->__devices), siblings)
 
-extern void scsi_adjust_queue_depth(struct scsi_device *, int);
+extern int scsi_change_queue_depth(struct scsi_device *, int);
 extern int scsi_track_queue_full(struct scsi_device *, int);
 
 extern int scsi_set_medium_removal(struct scsi_device *, char);
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 61a81bf77e28..c8a462ef9a4e 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -46,12 +46,6 @@ struct blk_queue_tags;
 #define DISABLE_CLUSTERING 0
 #define ENABLE_CLUSTERING 1
 
-enum {
-        SCSI_QDEPTH_DEFAULT,    /* default requested change, e.g. from sysfs */
-        SCSI_QDEPTH_QFULL,      /* scsi-ml requested due to queue full */
-        SCSI_QDEPTH_RAMP_UP,    /* scsi-ml requested due to threshold event */
-};
-
 struct scsi_host_template {
         struct module *module;
         const char *name;
@@ -195,7 +189,7 @@ struct scsi_host_template {
          * Things currently recommended to be handled at this time include:
          *
          * 1.  Setting the device queue depth.  Proper setting of this is
-         *     described in the comments for scsi_adjust_queue_depth.
+         *     described in the comments for scsi_change_queue_depth.
          * 2.  Determining if the device supports the various synchronous
          *     negotiation protocols.  The device struct will already have
          *     responded to INQUIRY and the results of the standard items
@@ -281,7 +275,7 @@ struct scsi_host_template {
          *
          * Status: OPTIONAL
          */
-        int (* change_queue_depth)(struct scsi_device *, int, int);
+        int (* change_queue_depth)(struct scsi_device *, int);
 
         /*
          * Fill in this function to allow the changing of tag types
@@ -427,6 +421,11 @@ struct scsi_host_template {
         unsigned use_blk_tags:1;
 
         /*
+         * Track QUEUE_FULL events and reduce queue depth on demand.
+         */
+        unsigned track_queue_depth:1;
+
+        /*
          * This specifies the mode that a LLD supports.
          */
         unsigned supported_mode:2;