[dm-devel] [PATCH] if READA is intentionally ignored, that is not EIO, but EWOULDBLOCK

[Lars Ellenberg <lars ellenberg linbit com>]

Signed-off-by: Lars Ellenberg <lars ellenberg linbit com>
---
 drivers/md/dm-zero.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/md/dm-zero.c b/drivers/md/dm-zero.c
index bdec206..7b9f5e5 100644
--- a/drivers/md/dm-zero.c
+++ b/drivers/md/dm-zero.c
@@ -37,7 +37,7 @@ static int zero_map(struct dm_target *ti, struct bio *bio,
 		break;
 	case READA:
 		/* readahead of null bytes only wastes buffer cache */
-		return -EIO;
+		return -EWOULDBLOCK;
 	case WRITE:
 		/* writes get silently dropped */
 		break;
-- 
1.5.5.GIT


-- 
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