Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / mtd / ubi / vmt.c

diff --git a/kernel/drivers/mtd/ubi/vmt.c b/kernel/drivers/mtd/ubi/vmt.c
index 1ae17bb..3ea4c02 100644 (file)
--- a/kernel/drivers/mtd/ubi/vmt.c
+++ b/kernel/drivers/mtd/ubi/vmt.c
@@ -488,13 +488,6 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
                spin_unlock(&ubi->volumes_lock);
        }
 
-       /* Change volume table record */
-       vtbl_rec = ubi->vtbl[vol_id];
-       vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
-       err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
-       if (err)
-               goto out_acc;
-
        if (pebs < 0) {
                for (i = 0; i < -pebs; i++) {
                        err = ubi_eba_unmap_leb(ubi, vol, reserved_pebs + i);
@@ -512,6 +505,24 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
                spin_unlock(&ubi->volumes_lock);
        }
 
+       /*
+        * When we shrink a volume we have to flush all pending (erase) work.
+        * Otherwise it can happen that upon next attach UBI finds a LEB with
+        * lnum > highest_lnum and refuses to attach.
+        */
+       if (pebs < 0) {
+               err = ubi_wl_flush(ubi, vol_id, UBI_ALL);
+               if (err)
+                       goto out_acc;
+       }
+
+       /* Change volume table record */
+       vtbl_rec = ubi->vtbl[vol_id];
+       vtbl_rec.reserved_pebs = cpu_to_be32(reserved_pebs);
+       err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
+       if (err)
+               goto out_acc;
+
        vol->reserved_pebs = reserved_pebs;
        if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
                vol->used_ebs = reserved_pebs;