UBI: fix debugging stuff

Do not check volumes which are currently in use because thay may be
in inconsistent state.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index a0c6e1e6d465de11cc85c441aecd4d9cde5d875f..d62dac90e1087409faa00f094a3e5b3f935e9c0b 100644 (file)
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -644,21 +644,33 @@ void ubi_free_volume(struct ubi_device *ubi, int vol_id)
  * @ubi: UBI device description object
  * @vol_id: volume ID
  */
-static void paranoid_check_volume(const struct ubi_device *ubi, int vol_id)
+static void paranoid_check_volume(struct ubi_device *ubi, int vol_id)
 {
        int idx = vol_id2idx(ubi, vol_id);
        int reserved_pebs, alignment, data_pad, vol_type, name_len, upd_marker;
-       const struct ubi_volume *vol = ubi->volumes[idx];
+       const struct ubi_volume *vol;
        long long n;
        const char *name;
 
+       spin_lock(&ubi->volumes_lock);
        reserved_pebs = be32_to_cpu(ubi->vtbl[vol_id].reserved_pebs);
+       vol = ubi->volumes[idx];
 
        if (!vol) {
                if (reserved_pebs) {
                        ubi_err("no volume info, but volume exists");
                        goto fail;
                }
+               spin_unlock(&ubi->volumes_lock);
+               return;
+       }
+
+       if (vol->exclusive) {
+               /*
+                * The volume may be being created at the moment, do not check
+                * it (e.g., it may be in the middle of ubi_create_volume().
+                */
+               spin_unlock(&ubi->volumes_lock);
                return;
        }
 
@@ -783,12 +795,14 @@ static void paranoid_check_volume(const struct ubi_device *ubi, int vol_id)
                goto fail;
        }
 
+       spin_unlock(&ubi->volumes_lock);
        return;
 
 fail:
        ubi_err("paranoid check failed for volume %d", vol_id);
        ubi_dbg_dump_vol_info(vol);
        ubi_dbg_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
+       spin_unlock(&ubi->volumes_lock);
        BUG();
 }
 
@@ -801,10 +815,8 @@ static void paranoid_check_volumes(struct ubi_device *ubi)
        int i;
 
        mutex_lock(&ubi->vtbl_mutex);
-       spin_lock(&ubi->volumes_lock);
        for (i = 0; i < ubi->vtbl_slots; i++)
                paranoid_check_volume(ubi, i);
-       spin_unlock(&ubi->volumes_lock);
        mutex_unlock(&ubi->vtbl_mutex);
 }
 #endif