From: Josef Bacik <jbacik@fusionio.com>
Date: Fri, 5 Oct 2012 20:40:32 +0000 (-0400)
Subject: Btrfs: don't bug on enomem in readpage
X-Git-Tag: v3.7-rc3~21^2~16
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=edd33c99c4ba26ebe17c1a3d65b4aba25482ed32;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

Btrfs: don't bug on enomem in readpage

Get rid of the BUG_ON(ret == -ENOMEM) in __extent_read_full_page.  Thanks,

Reported-by: Jérôme Poulin <jeromepoulin@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index b82d244..8c37cb6 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2751,12 +2751,15 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
 					 end_bio_extent_readpage, mirror_num,
 					 *bio_flags,
 					 this_bio_flag);
-			BUG_ON(ret == -ENOMEM);
-			nr++;
-			*bio_flags = this_bio_flag;
+			if (!ret) {
+				nr++;
+				*bio_flags = this_bio_flag;
+			}
 		}
-		if (ret)
+		if (ret) {
 			SetPageError(page);
+			unlock_extent(tree, cur, cur + iosize - 1);
+		}
 		cur = cur + iosize;
 		pg_offset += iosize;
 	}