Merge tag 'upstream-4.4-rc1' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS updates from Richard Weinberger:

 - access time support for UBIFS by Dongsheng Yang

 - random cleanups and bug fixes all over the place

* tag 'upstream-4.4-rc1' of git://git.infradead.org/linux-ubifs:
  ubifs: introduce UBIFS_ATIME_SUPPORT to ubifs
  ubifs: make ubifs_[get|set]xattr atomic
  UBIFS: Delete unnecessary checks before the function call "iput"
  UBI: Remove in vain semicolon
  UBI: Fastmap: Fix PEB array type
  UBIFS: Fix possible memory leak in ubifs_readdir()
  fs/ubifs: remove unnecessary new_valid_dev check
  ubi: fastmap: Implement produce_free_peb()
  UBIFS: print verbose message when rescanning a corrupted node
  UBIFS: call dbg_is_power_cut() instead of reading c->dbg->pc_happened
  UBI: drop null test before destroy functions
  UBI: Update comments to reflect UBI_METAONLY flag
  UBI: Fix debug message
  UBI: Fix typo in comment
  UBI: Fastmap: Simplify expression
  UBIFS: fix a typo in comment of ubifs_budget_req
  UBIFS: use kmemdup rather than duplicating its implementation

6 files changed, 35 insertions, 8 deletions

diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index 68eea5b..c1aaf03 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -1209,9 +1209,7 @@ static void destroy_ai(struct ubi_attach_info *ai)
 		}
 	}
 
-	if (ai->aeb_slab_cache)
-		kmem_cache_destroy(ai->aeb_slab_cache);
-
+	kmem_cache_destroy(ai->aeb_slab_cache);
 	kfree(ai);
 }
 
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index d16fccf..54e056d 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -949,7 +949,7 @@ static long ubi_cdev_ioctl(struct file *file, unsigned int cmd,
 		if (!req) {
 			err = -ENOMEM;
 			break;
-		};
+		}
 
 		err = copy_from_user(req, argp, sizeof(struct ubi_rnvol_req));
 		if (err) {
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 51bca03..5b9834c 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -1358,7 +1358,7 @@ int self_check_eba(struct ubi_device *ubi, struct ubi_attach_info *ai_fastmap,
 					continue;
 
 				ubi_err(ubi, "LEB:%i:%i is PEB:%i instead of %i!",
-					vol->vol_id, i, fm_eba[i][j],
+					vol->vol_id, j, fm_eba[i][j],
 					scan_eba[i][j]);
 				ubi_assert(0);
 			}
diff --git a/drivers/mtd/ubi/fastmap-wl.c b/drivers/mtd/ubi/fastmap-wl.c
index b2a6653..30d3999 100644
--- a/drivers/mtd/ubi/fastmap-wl.c
+++ b/drivers/mtd/ubi/fastmap-wl.c
@@ -172,6 +172,30 @@ void ubi_refill_pools(struct ubi_device *ubi)
 }
 
 /**
+ * produce_free_peb - produce a free physical eraseblock.
+ * @ubi: UBI device description object
+ *
+ * This function tries to make a free PEB by means of synchronous execution of
+ * pending works. This may be needed if, for example the background thread is
+ * disabled. Returns zero in case of success and a negative error code in case
+ * of failure.
+ */
+static int produce_free_peb(struct ubi_device *ubi)
+{
+	int err;
+
+	while (!ubi->free.rb_node && ubi->works_count) {
+		dbg_wl("do one work synchronously");
+		err = do_work(ubi);
+
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
+/**
  * ubi_wl_get_peb - get a physical eraseblock.
  * @ubi: UBI device description object
  *
@@ -213,6 +237,11 @@ again:
 		}
 		retried = 1;
 		up_read(&ubi->fm_eba_sem);
+		ret = produce_free_peb(ubi);
+		if (ret < 0) {
+			down_read(&ubi->fm_eba_sem);
+			goto out;
+		}
 		goto again;
 	}
 
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index 4aa2fd8..263b439 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -450,7 +450,7 @@ static void unmap_peb(struct ubi_attach_info *ai, int pnum)
  * < 0 indicates an internal error.
  */
 static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
-		     int *pebs, int pool_size, unsigned long long *max_sqnum,
+		     __be32 *pebs, int pool_size, unsigned long long *max_sqnum,
 		     struct list_head *free)
 {
 	struct ubi_vid_hdr *vh;
@@ -775,7 +775,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 		for (j = 0; j < be32_to_cpu(fm_eba->reserved_pebs); j++) {
 			int pnum = be32_to_cpu(fm_eba->pnum[j]);
 
-			if ((int)be32_to_cpu(fm_eba->pnum[j]) < 0)
+			if (pnum < 0)
 				continue;
 
 			aeb = NULL;
diff --git a/drivers/mtd/ubi/ubi-media.h b/drivers/mtd/ubi/ubi-media.h
index d0d072e..22ed3f6 100644
--- a/drivers/mtd/ubi/ubi-media.h
+++ b/drivers/mtd/ubi/ubi-media.h
@@ -500,7 +500,7 @@ struct ubi_fm_volhdr {
 /* struct ubi_fm_volhdr is followed by one struct ubi_fm_eba records */
 
 /**
- * struct ubi_fm_eba - denotes an association beween a PEB and LEB
+ * struct ubi_fm_eba - denotes an association between a PEB and LEB
  * @magic: EBA table magic number
  * @reserved_pebs: number of table entries
  * @pnum: PEB number of LEB (LEB is the index)