[4/4] NVMe: don't allocate unused nvme_major

Commit Message

NeilBrown March 9, 2016, 9:59 p.m. UTC

When alloc_disk(0) is used, the ->major number is ignored.  All device
numbers are allocated with a major of BLOCK_EXT_MAJOR.

So remove all references to nvme_major.

Signed-off-by: NeilBrown <[e-mail]>
---
 drivers/nvme/host/core.c |   16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

Comments

Johannes Thumshirn March 10, 2016, 9:06 a.m. UTC | #1

On Thu, Mar 10, 2016 at 08:59:28AM +1100, NeilBrown wrote:
> When alloc_disk(0) is used, the ->major number is ignored.  All device
> numbers are allocated with a major of BLOCK_EXT_MAJOR.
> 
> So remove all references to nvme_major.
> 
> Signed-off-by: NeilBrown <[e-mail]>

Reviewed-by: Johannes Thumshirn <[e-mail]>

Patch

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 03c46412fff4..10e2435c84a9 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -33,9 +33,6 @@ 
 
 #define NVME_MINORS		(1U << MINORBITS)
 
-static int nvme_major;
-module_param(nvme_major, int, 0);
-
 static int nvme_char_major;
 module_param(nvme_char_major, int, 0);
 
@@ -1170,8 +1167,6 @@  static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
 	blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift);
 	nvme_set_queue_limits(ctrl, ns->queue);
 
-	disk->major = nvme_major;
-	disk->first_minor = 0;
 	disk->fops = &nvme_fops;
 	disk->private_data = ns;
 	disk->queue = ns->queue;
@@ -1480,16 +1475,10 @@  int __init nvme_core_init(void)
 {
 	int result;
 
-	result = register_blkdev(nvme_major, "nvme");
-	if (result < 0)
-		return result;
-	else if (result > 0)
-		nvme_major = result;
-
 	result = __register_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme",
 							&nvme_dev_fops);
 	if (result < 0)
-		goto unregister_blkdev;
+		return result;
 	else if (result > 0)
 		nvme_char_major = result;
 
@@ -1503,14 +1492,11 @@  int __init nvme_core_init(void)
 
  unregister_chrdev:
 	__unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme");
- unregister_blkdev:
-	unregister_blkdev(nvme_major, "nvme");
 	return result;
 }
 
 void nvme_core_exit(void)
 {
-	unregister_blkdev(nvme_major, "nvme");
 	class_destroy(nvme_class);
 	__unregister_chrdev(nvme_char_major, 0, NVME_MINORS, "nvme");
 }