[PATCH 01/16] UBI: Fastmap: Check find_mean_wl_entry()'s return value

[Richard Weinberger]

find_mean_wl_entry() is allowed to return NULL.

Signed-off-by: Richard Weinberger <richard at nod.at>
---
 drivers/mtd/ubi/wl.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index b44cba0..85a3373 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -509,6 +509,10 @@ retry:
 	}
 
 	e = find_mean_wl_entry(ubi, &ubi->free);
+	if (!e) {
+		ubi_err("no free eraseblocks");
+		return -ENOSPC;
+	}
 
 	self_check_in_wl_tree(ubi, e, &ubi->free);
 
-- 
1.7.6.5