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[PATCH v2 12/17] mm: ensure that we set mapping error if writeout() fails

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  [PATCH v2 12/17] mm: ensure that we set mapping error if writeout() fails Jeff Layton <jlayton@redhat.com> - 2017-04-12 14:10 +0200

#1622053 — [PATCH v2 12/17] mm: ensure that we set mapping error if writeout() fails

If writepage fails during a page migration, then we need to ensure that
fsync will see it by flagging the mapping.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 mm/migrate.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index ed97c2c14fa8..a77b9e769d0b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -792,7 +792,11 @@ static int writeout(struct address_space *mapping, struct page *page)
 		/* unlocked. Relock */
 		lock_page(page);
 
-	return (rc < 0) ? -EIO : -EAGAIN;
+	if (rc < 0) {
+		mapping_set_error(mapping, rc);
+		return -EIO;
+	}
+	return -EAGAIN;
 }
 
 /*
-- 
2.9.3

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