linux-kernel - [022/146] block: move bd_set_size() above rescan

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Message-Id: <20110601080248.431801387@blue.kroah.org>
Date:	Wed, 01 Jun 2011 16:59:18 +0900
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Tejun Heo <tj@...nel.org>, Jens Axboe <jaxboe@...ionio.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [022/146] block: move bd_set_size() above rescan_partitions() in

2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------
 __blkdev_get()

From: Tejun Heo <tj@...nel.org>

commit 7e69723fef8771a9d57bd27d36281d756130b4b5 upstream.

02e352287a4 (block: rescan partitions on invalidated devices on
-ENOMEDIA too) relocated partition rescan above explicit bd_set_size()
to simplify condition check.  As rescan_partitions() does its own bdev
size setting, this doesn't break anything; however,
rescan_partitions() prints out the following messages when adjusting
bdev size, which can be confusing.

  sda: detected capacity change from 0 to 146815737856
  sdb: detected capacity change from 0 to 146815737856

This patch restores the original order and remove the warning
messages.

stable: Please apply together with 02e352287a4 (block: rescan
        partitions on invalidated devices on -ENOMEDIA too).

Signed-off-by: Tejun Heo <tj@...nel.org>
Reported-by: Tony Luck <tony.luck@...il.com>
Tested-by: Tony Luck <tony.luck@...il.com>
Signed-off-by: Jens Axboe <jaxboe@...ionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>


---
 fs/block_dev.c |   17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1116,6 +1116,15 @@ static int __blkdev_get(struct block_dev
 					goto restart;
 				}
 			}
+
+			if (!ret && !bdev->bd_openers) {
+				bd_set_size(bdev,(loff_t)get_capacity(disk)<<9);
+				bdi = blk_get_backing_dev_info(bdev);
+				if (bdi == NULL)
+					bdi = &default_backing_dev_info;
+				bdev_inode_switch_bdi(bdev->bd_inode, bdi);
+			}
+
 			/*
 			 * If the device is invalidated, rescan partition
 			 * if open succeeded or failed with -ENOMEDIUM.
@@ -1126,14 +1135,6 @@ static int __blkdev_get(struct block_dev
 				rescan_partitions(disk, bdev);
 			if (ret)
 				goto out_clear;
-
-			if (!bdev->bd_openers) {
-				bd_set_size(bdev,(loff_t)get_capacity(disk)<<9);
-				bdi = blk_get_backing_dev_info(bdev);
-				if (bdi == NULL)
-					bdi = &default_backing_dev_info;
-				bdev_inode_switch_bdi(bdev->bd_inode, bdi);
-			}
 		} else {
 			struct block_device *whole;
 			whole = bdget_disk(disk, 0);


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