linux-kernel - [PATCH 01/16] UBI: Fastmap: Check find_mean_wl

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Date:	Wed, 27 Jun 2012 17:57:41 +0200
From:	Richard Weinberger <richard@....at>
To:	linux-mtd@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org, adrian.hunter@...el.com,
	Heinz.Egger@...utronix.de, thomas.wucher@...utronix.de,
	shmulik.ladkani@...il.com, tglx@...utronix.de,
	tim.bird@...sony.com, Marius.Mazarel@...l.ro,
	artem.bityutskiy@...ux.intel.com, nyoushchenko@...sta.com,
	Richard Weinberger <richard@....at>
Subject: [PATCH 01/16] UBI: Fastmap: Check find_mean_wl_entry()'s return value

find_mean_wl_entry() is allowed to return NULL.

Signed-off-by: Richard Weinberger <richard@....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

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