3 files changed, 54 insertions, 26 deletions

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 2ffdc9e0532d..38c3a291efac 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -263,6 +263,10 @@ static void scsi_host_dev_release(struct device *dev)
                 kthread_stop(shost->ehandler);
         if (shost->work_q)
                 destroy_workqueue(shost->work_q);
+        if (shost->uspace_req_q) {
+                kfree(shost->uspace_req_q->queuedata);
+                scsi_free_queue(shost->uspace_req_q);
+        }
 
         scsi_destroy_command_freelist(shost);
         if (shost->bqt)
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 780d6dc92b42..fafc00deaade 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -156,8 +156,7 @@ static struct scsi_host_cmd_pool scsi_cmd_dma_pool = {
 
 static DEFINE_MUTEX(host_cmd_pool_mutex);
 
-static struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *shost,
-                                            gfp_t gfp_mask)
+struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *shost, gfp_t gfp_mask)
 {
         struct scsi_cmnd *cmd;
 
@@ -178,6 +177,7 @@ static struct scsi_cmnd *__scsi_get_command(struct Scsi_Host *shost,
 
         return cmd;
 }
+EXPORT_SYMBOL_GPL(__scsi_get_command);
 
 /*
  * Function:    scsi_get_command()
@@ -214,9 +214,29 @@ struct scsi_cmnd *scsi_get_command(struct scsi_device *dev, gfp_t gfp_mask)
                 put_device(&dev->sdev_gendev);
 
         return cmd;
-}                               
+}
 EXPORT_SYMBOL(scsi_get_command);
 
+void __scsi_put_command(struct Scsi_Host *shost, struct scsi_cmnd *cmd,
+                        struct device *dev)
+{
+        unsigned long flags;
+
+        /* changing locks here, don't need to restore the irq state */
+        spin_lock_irqsave(&shost->free_list_lock, flags);
+        if (unlikely(list_empty(&shost->free_list))) {
+                list_add(&cmd->list, &shost->free_list);
+                cmd = NULL;
+        }
+        spin_unlock_irqrestore(&shost->free_list_lock, flags);
+
+        if (likely(cmd != NULL))
+                kmem_cache_free(shost->cmd_pool->slab, cmd);
+
+        put_device(dev);
+}
+EXPORT_SYMBOL(__scsi_put_command);
+
 /*
  * Function:    scsi_put_command()
  *
@@ -231,26 +251,15 @@ EXPORT_SYMBOL(scsi_get_command);
 void scsi_put_command(struct scsi_cmnd *cmd)
 {
         struct scsi_device *sdev = cmd->device;
-        struct Scsi_Host *shost = sdev->host;
         unsigned long flags;
-        
+
         /* serious error if the command hasn't come from a device list */
         spin_lock_irqsave(&cmd->device->list_lock, flags);
         BUG_ON(list_empty(&cmd->list));
         list_del_init(&cmd->list);
-        spin_unlock(&cmd->device->list_lock);
-        /* changing locks here, don't need to restore the irq state */
-        spin_lock(&shost->free_list_lock);
-        if (unlikely(list_empty(&shost->free_list))) {
-                list_add(&cmd->list, &shost->free_list);
-                cmd = NULL;
-        }
-        spin_unlock_irqrestore(&shost->free_list_lock, flags);
+        spin_unlock_irqrestore(&cmd->device->list_lock, flags);
 
-        if (likely(cmd != NULL))
-                kmem_cache_free(shost->cmd_pool->slab, cmd);
-
-        put_device(&sdev->sdev_gendev);
+        __scsi_put_command(cmd->device->host, cmd, &sdev->sdev_gendev);
 }
 EXPORT_SYMBOL(scsi_put_command);
 
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 2f12f9f12fcb..fb616c69151f 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -704,7 +704,7 @@ static struct scsi_cmnd *scsi_end_request(struct scsi_cmnd *cmd, int uptodate,
         return NULL;
 }
 
-static struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask)
+struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_mask)
 {
         struct scsi_host_sg_pool *sgp;
         struct scatterlist *sgl;
@@ -745,7 +745,9 @@ static struct scatterlist *scsi_alloc_sgtable(struct scsi_cmnd *cmd, gfp_t gfp_m
         return sgl;
 }
 
-static void scsi_free_sgtable(struct scatterlist *sgl, int index)
+EXPORT_SYMBOL(scsi_alloc_sgtable);
+
+void scsi_free_sgtable(struct scatterlist *sgl, int index)
 {
         struct scsi_host_sg_pool *sgp;
 
@@ -755,6 +757,8 @@ static void scsi_free_sgtable(struct scatterlist *sgl, int index)
         mempool_free(sgl, sgp->pool);
 }
 
+EXPORT_SYMBOL(scsi_free_sgtable);
+
 /*
  * Function:    scsi_release_buffers()
  *
@@ -1567,29 +1571,40 @@ u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost)
 }
 EXPORT_SYMBOL(scsi_calculate_bounce_limit);
 
-struct request_queue *scsi_alloc_queue(struct scsi_device *sdev)
+struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost,
+                                         request_fn_proc *request_fn)
 {
-        struct Scsi_Host *shost = sdev->host;
         struct request_queue *q;
 
-        q = blk_init_queue(scsi_request_fn, NULL);
+        q = blk_init_queue(request_fn, NULL);
         if (!q)
                 return NULL;
 
-        blk_queue_prep_rq(q, scsi_prep_fn);
-
         blk_queue_max_hw_segments(q, shost->sg_tablesize);
         blk_queue_max_phys_segments(q, SCSI_MAX_PHYS_SEGMENTS);
         blk_queue_max_sectors(q, shost->max_sectors);
         blk_queue_bounce_limit(q, scsi_calculate_bounce_limit(shost));
         blk_queue_segment_boundary(q, shost->dma_boundary);
-        blk_queue_issue_flush_fn(q, scsi_issue_flush_fn);
-        blk_queue_softirq_done(q, scsi_softirq_done);
 
         if (!shost->use_clustering)
                 clear_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
         return q;
 }
+EXPORT_SYMBOL(__scsi_alloc_queue);
+
+struct request_queue *scsi_alloc_queue(struct scsi_device *sdev)
+{
+        struct request_queue *q;
+
+        q = __scsi_alloc_queue(sdev->host, scsi_request_fn);
+        if (!q)
+                return NULL;
+
+        blk_queue_prep_rq(q, scsi_prep_fn);
+        blk_queue_issue_flush_fn(q, scsi_issue_flush_fn);
+        blk_queue_softirq_done(q, scsi_softirq_done);
+        return q;
+}
 
 void scsi_free_queue(struct request_queue *q)
 {