[PATCH] f2fs:Fix error handling for calls to the function add_free_nid in the file node.c

[PATCH] f2fs:Fix error handling for calls to the function add_free_nid in the file node.c

[Nicholas Krause]

This fixes error handling for calls to the function add_free_nid
in the functions __flush_nat_entry_set and build_free_nids to
properly check if their call to this particular function return
a error code and if so break out these function's for loops as
we cannot continue these loops if these function calls fail in

Signed-off-by: Nicholas Krause <xerofoify@gmail.com>
---
 fs/f2fs/node.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 7dd63b7..1a3fb57 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1545,8 +1545,10 @@ static void build_free_nids(struct f2fs_sb_info *sbi)
 	for (i = 0; i < nats_in_cursum(sum); i++) {
 		block_t addr = le32_to_cpu(nat_in_journal(sum, i).block_addr);
 		nid = le32_to_cpu(nid_in_journal(sum, i));
-		if (addr == NULL_ADDR)
-			add_free_nid(sbi, nid, true);
+		if (addr == NULL_ADDR) {
+			if (add_free_nid(sbi, nid, true) < 0)
+				break;
+		}
 		else
 			remove_free_nid(nm_i, nid);
 	}
@@ -1879,8 +1881,10 @@ static void __flush_nat_entry_set(struct f2fs_sb_info *sbi,
 		__clear_nat_cache_dirty(NM_I(sbi), ne);
 		up_write(&NM_I(sbi)->nat_tree_lock);
 
-		if (nat_get_blkaddr(ne) == NULL_ADDR)
-			add_free_nid(sbi, nid, false);
+		if (nat_get_blkaddr(ne) == NULL_ADDR) {
+			if (add_free_nid(sbi, nid, false) < 0)
+				break;
+		}
 	}
 
 	if (to_journal)
-- 
2.1.4


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