md: fix return value of rdev_size_change()

commit c26a44ed1e552aaa1d4ceb71842002d235fe98d7 upstream.

When trying to grow an array by enlarging component devices,
rdev_size_store() expects the return value of rdev_size_change() to be
in sectors, but the actual value is returned in KBs.

This functionality was broken by commit
     dd8ac336c13fd8afdb082ebacb1cddd5cf727889
so this patch is suitable for any kernel since 2.6.30.

Signed-off-by: Justin Maggard <jmaggard10@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 81c028250e69f4ae91396a172ae746784c89f5b2..92dbef5f3b5fd29fe41b90df255c4278d5c70593 100644 (file)
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1260,7 +1260,7 @@ super_90_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
        md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,
                       rdev->sb_page);
        md_super_wait(rdev->mddev);
-       return num_sectors / 2; /* kB for sysfs */
+       return num_sectors;
 }
 
 
@@ -1622,7 +1622,7 @@ super_1_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
        md_super_write(rdev->mddev, rdev, rdev->sb_start, rdev->sb_size,
                       rdev->sb_page);
        md_super_wait(rdev->mddev);
-       return num_sectors / 2; /* kB for sysfs */
+       return num_sectors;
 }
 
 static struct super_type super_types[] = {