Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

* 'linux-next' of git://git.infradead.org/ubifs-2.6:
  UBIFS: fix a memory leak on error path.
  UBIFS: fix GC LEB recovery
  UBIFS: use ERR_CAST
  UBIFS: check return code

4 files changed, 29 insertions, 14 deletions

diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index ad7f67b827e..0084a33c4c6 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1457,13 +1457,13 @@ struct ubifs_lprops *ubifs_lpt_lookup(struct ubifs_info *c, int lnum)
                 shft -= UBIFS_LPT_FANOUT_SHIFT;
                 nnode = ubifs_get_nnode(c, nnode, iip);
                 if (IS_ERR(nnode))
-                        return ERR_PTR(PTR_ERR(nnode));
+                        return ERR_CAST(nnode);
         }
         iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
         shft -= UBIFS_LPT_FANOUT_SHIFT;
         pnode = ubifs_get_pnode(c, nnode, iip);
         if (IS_ERR(pnode))
-                return ERR_PTR(PTR_ERR(pnode));
+                return ERR_CAST(pnode);
         iip = (i & (UBIFS_LPT_FANOUT - 1));
         dbg_lp("LEB %d, free %d, dirty %d, flags %d", lnum,
                pnode->lprops[iip].free, pnode->lprops[iip].dirty,
@@ -1586,7 +1586,7 @@ struct ubifs_lprops *ubifs_lpt_lookup_dirty(struct ubifs_info *c, int lnum)
         nnode = c->nroot;
         nnode = dirty_cow_nnode(c, nnode);
         if (IS_ERR(nnode))
-                return ERR_PTR(PTR_ERR(nnode));
+                return ERR_CAST(nnode);
         i = lnum - c->main_first;
         shft = c->lpt_hght * UBIFS_LPT_FANOUT_SHIFT;
         for (h = 1; h < c->lpt_hght; h++) {
@@ -1594,19 +1594,19 @@ struct ubifs_lprops *ubifs_lpt_lookup_dirty(struct ubifs_info *c, int lnum)
                 shft -= UBIFS_LPT_FANOUT_SHIFT;
                 nnode = ubifs_get_nnode(c, nnode, iip);
                 if (IS_ERR(nnode))
-                        return ERR_PTR(PTR_ERR(nnode));
+                        return ERR_CAST(nnode);
                 nnode = dirty_cow_nnode(c, nnode);
                 if (IS_ERR(nnode))
-                        return ERR_PTR(PTR_ERR(nnode));
+                        return ERR_CAST(nnode);
         }
         iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
         shft -= UBIFS_LPT_FANOUT_SHIFT;
         pnode = ubifs_get_pnode(c, nnode, iip);
         if (IS_ERR(pnode))
-                return ERR_PTR(PTR_ERR(pnode));
+                return ERR_CAST(pnode);
         pnode = dirty_cow_pnode(c, pnode);
         if (IS_ERR(pnode))
-                return ERR_PTR(PTR_ERR(pnode));
+                return ERR_CAST(pnode);
         iip = (i & (UBIFS_LPT_FANOUT - 1));
         dbg_lp("LEB %d, free %d, dirty %d, flags %d", lnum,
                pnode->lprops[iip].free, pnode->lprops[iip].dirty,
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index 13cb7a4237b..d12535b7fc7 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -646,7 +646,7 @@ static struct ubifs_pnode *pnode_lookup(struct ubifs_info *c, int i)
                 shft -= UBIFS_LPT_FANOUT_SHIFT;
                 nnode = ubifs_get_nnode(c, nnode, iip);
                 if (IS_ERR(nnode))
-                        return ERR_PTR(PTR_ERR(nnode));
+                        return ERR_CAST(nnode);
         }
         iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
         return ubifs_get_pnode(c, nnode, iip);
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index 109c6ea03bb..daae9e1f538 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -24,7 +24,7 @@
  * This file implements functions needed to recover from unclean un-mounts.
  * When UBIFS is mounted, it checks a flag on the master node to determine if
  * an un-mount was completed successfully. If not, the process of mounting
- * incorparates additional checking and fixing of on-flash data structures.
+ * incorporates additional checking and fixing of on-flash data structures.
  * UBIFS always cleans away all remnants of an unclean un-mount, so that
  * errors do not accumulate. However UBIFS defers recovery if it is mounted
  * read-only, and the flash is not modified in that case.
@@ -1063,8 +1063,21 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
         }
         err = ubifs_find_dirty_leb(c, &lp, wbuf->offs, 2);
         if (err) {
-                if (err == -ENOSPC)
-                        dbg_err("could not find a dirty LEB");
+                /*
+                 * There are no dirty or empty LEBs subject to here being
+                 * enough for the index. Try to use
+                 * 'ubifs_find_free_leb_for_idx()', which will return any empty
+                 * LEBs (ignoring index requirements). If the index then
+                 * doesn't have enough LEBs the recovery commit will fail -
+                 * which is the  same result anyway i.e. recovery fails. So
+                 * there is no problem ignoring index  requirements and just
+                 * grabbing a free LEB since we have already established there
+                 * is not a dirty LEB we could have used instead.
+                 */
+                if (err == -ENOSPC) {
+                        dbg_rcvry("could not find a dirty LEB");
+                        goto find_free;
+                }
                 return err;
         }
         ubifs_assert(!(lp.flags & LPROPS_INDEX));
@@ -1139,8 +1152,8 @@ int ubifs_rcvry_gc_commit(struct ubifs_info *c)
 find_free:
         /*
          * There is no GC head LEB or the free space in the GC head LEB is too
-         * small. Allocate gc_lnum by calling 'ubifs_find_free_leb_for_idx()' so
-         * GC is not run.
+         * small, or there are not dirty LEBs. Allocate gc_lnum by calling
+         * 'ubifs_find_free_leb_for_idx()' so GC is not run.
          */
         lnum = ubifs_find_free_leb_for_idx(c);
         if (lnum < 0) {
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 4d2f2157dd3..5fc5a098897 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1307,6 +1307,8 @@ static int mount_ubifs(struct ubifs_info *c)
                         if (err)
                                 goto out_orphans;
                         err = ubifs_rcvry_gc_commit(c);
+                        if (err)
+                                goto out_orphans;
                 } else {
                         err = take_gc_lnum(c);
                         if (err)
@@ -1318,7 +1320,7 @@ static int mount_ubifs(struct ubifs_info *c)
                          */
                         err = ubifs_leb_unmap(c, c->gc_lnum);
                         if (err)
-                                return err;
+                                goto out_orphans;
                 }
 
                 err = dbg_check_lprops(c);