1 files changed, 16 insertions, 26 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index b84766e347c3..136051bc6725 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5165,7 +5165,7 @@ static void *raid5_takeover_raid6(mddev_t *mddev)
 }
 
 
-static int raid5_reconfig(mddev_t *mddev, int new_layout, int new_chunk)
+static int raid5_reconfig(mddev_t *mddev)
 {
         /* For a 2-drive array, the layout and chunk size can be changed
          * immediately as not restriping is needed.
@@ -5173,15 +5173,16 @@ static int raid5_reconfig(mddev_t *mddev, int new_layout, int new_chunk)
          * to be used by a reshape pass.
          */
         raid5_conf_t *conf = mddev->private;
+        int new_chunk = mddev->new_chunk_sectors;
 
-        if (new_layout >= 0 && !algorithm_valid_raid5(new_layout))
+        if (mddev->new_layout >= 0 && !algorithm_valid_raid5(mddev->new_layout))
                 return -EINVAL;
         if (new_chunk > 0) {
                 if (!is_power_of_2(new_chunk))
                         return -EINVAL;
-                if (new_chunk < PAGE_SIZE)
+                if (new_chunk < (PAGE_SIZE>>9))
                         return -EINVAL;
-                if (mddev->array_sectors & ((new_chunk>>9)-1))
+                if (mddev->array_sectors & (new_chunk-1))
                         /* not factor of array size */
                         return -EINVAL;
         }
@@ -5189,48 +5190,37 @@ static int raid5_reconfig(mddev_t *mddev, int new_layout, int new_chunk)
         /* They look valid */
 
         if (mddev->raid_disks == 2) {
-
-                if (new_layout >= 0) {
-                        conf->algorithm = new_layout;
-                        mddev->layout = mddev->new_layout = new_layout;
+                /* can make the change immediately */
+                if (mddev->new_layout >= 0) {
+                        conf->algorithm = mddev->new_layout;
+                        mddev->layout = mddev->new_layout;
                 }
                 if (new_chunk > 0) {
-                        conf->chunk_sectors = new_chunk >> 9;
-                        mddev->new_chunk_sectors = new_chunk >> 9;
-                        mddev->chunk_sectors = new_chunk >> 9;
+                        conf->chunk_sectors = new_chunk ;
+                        mddev->chunk_sectors = new_chunk;
                 }
                 set_bit(MD_CHANGE_DEVS, &mddev->flags);
                 md_wakeup_thread(mddev->thread);
-        } else {
-                if (new_layout >= 0)
-                        mddev->new_layout = new_layout;
-                if (new_chunk > 0)
-                        mddev->new_chunk_sectors = new_chunk >> 9;
         }
         return 0;
 }
 
-static int raid6_reconfig(mddev_t *mddev, int new_layout, int new_chunk)
+static int raid6_reconfig(mddev_t *mddev)
 {
-        if (new_layout >= 0 && !algorithm_valid_raid6(new_layout))
+        int new_chunk = mddev->new_chunk_sectors;
+        if (mddev->new_layout >= 0 && !algorithm_valid_raid6(mddev->new_layout))
                 return -EINVAL;
         if (new_chunk > 0) {
                 if (!is_power_of_2(new_chunk))
                         return -EINVAL;
-                if (new_chunk < PAGE_SIZE)
+                if (new_chunk < (PAGE_SIZE >> 9))
                         return -EINVAL;
-                if (mddev->array_sectors & ((new_chunk>>9)-1))
+                if (mddev->array_sectors & (new_chunk-1))
                         /* not factor of array size */
                         return -EINVAL;
         }
 
         /* They look valid */
-
-        if (new_layout >= 0)
-                mddev->new_layout = new_layout;
-        if (new_chunk > 0)
-                mddev->new_chunk_sectors = new_chunk >> 9;
-
         return 0;
 }