[PATCH] brd: return register_blkdev err code when it fails

[chaiwen]

Hi Nick

when register_blk fails,no matter what reasons,brd_init always
returns a "-EIO" error code. if brd_init returns the error code
returned by register_blkdev,the formatted error info reported
when module inserting failed(caused by register_blkdev failing)
could be more meaningfull.

Signed-off-by: chaiwen <chaiw.fnst@xxxxxxxxxxxxxx>
---
 drivers/block/brd.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 9bf4371..361204d 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -557,6 +557,7 @@ static int __init brd_init(void)
 	int i, nr;
 	unsigned long range;
 	struct brd_device *brd, *next;
+	int ret;
 
 	/*
 	 * brd module now has a feature to instantiate underlying device
@@ -602,8 +603,8 @@ static int __init brd_init(void)
 		range = 1UL << MINORBITS;
 	}
 
-	if (register_blkdev(RAMDISK_MAJOR, "ramdisk"))
-		return -EIO;
+	if (ret = register_blkdev(RAMDISK_MAJOR, "ramdisk"))
+		return ret;
 
 	for (i = 0; i < nr; i++) {
 		brd = brd_alloc(i);
-- 
1.7.1

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