bsg: bind bsg to request_queue instead of gendisk

This patch binds bsg devices to request_queue instead of gendisk. Any
objects (like transport entities) can define own request_handler and
create own bsg device.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

3 files changed, 10 insertions, 7 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2746632c2267..24b474e05a44 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -14,6 +14,7 @@
 #include <linux/bio.h>
 #include <linux/module.h>
 #include <linux/stringify.h>
+#include <linux/bsg.h>
 
 #include <asm/scatterlist.h>
 
@@ -470,6 +471,10 @@ struct request_queue
         unsigned int            bi_size;
 
         struct mutex            sysfs_lock;
+
+#if defined(CONFIG_BLK_DEV_BSG)
+        struct bsg_class_device bsg_dev;
+#endif
 };
 
 #define QUEUE_FLAG_CLUSTER      0       /* cluster several segments into 1 */
diff --git a/include/linux/bsg.h b/include/linux/bsg.h
index 2154a6dfbd53..0475a6d3ff6a 100644
--- a/include/linux/bsg.h
+++ b/include/linux/bsg.h
@@ -47,16 +47,16 @@ struct bsg_class_device {
         struct class_device *class_dev;
         struct device *dev;
         int minor;
-        struct gendisk *disk;
         struct list_head list;
+        struct request_queue *queue;
 };
 
-extern int bsg_register_disk(struct gendisk *);
-extern void bsg_unregister_disk(struct gendisk *);
+extern int bsg_register_queue(struct request_queue *, char *);
+extern void bsg_unregister_queue(struct request_queue *);
 #else
 struct bsg_class_device { };
-#define bsg_register_disk(disk)         (0)
-#define bsg_unregister_disk(disk)       do { } while (0)
+#define bsg_register_queue(disk, name)          (0)
+#define bsg_unregister_queue(disk)      do { } while (0)
 #endif
 
 #endif /* __KERNEL__ */
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 8c43d7032612..9756fc102a83 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -67,7 +67,6 @@ struct partition {
 #include <linux/string.h>
 #include <linux/fs.h>
 #include <linux/workqueue.h>
-#include <linux/bsg.h>
 
 struct partition {
         unsigned char boot_ind;         /* 0x80 - active */
@@ -92,7 +91,6 @@ struct hd_struct {
 #ifdef CONFIG_FAIL_MAKE_REQUEST
         int make_it_fail;
 #endif
-        struct bsg_class_device bsg_dev;
 };
 
 #define GENHD_FL_REMOVABLE                      1