From: Richard Weinberger <richard@nod.at>
Date: Fri, 26 Sep 2014 21:08:15 +0000 (+0200)
Subject: UBI: Fastmap: Ensure that all fastmap work is done upon WL shutdown
X-Git-Tag: v4.1-rc1~122^2~38
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=399a9feeac83c2f64138c438e41222a12dd71766;p=karo-tx-linux.git

UBI: Fastmap: Ensure that all fastmap work is done upon WL shutdown

...otherwise the deferred work might run after datastructures
got freed and corrupt memory.

Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Guido Martínez <guido@vanguardiasur.com.ar>
---

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index ae174f4ed674..bf66890fefad 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1856,6 +1856,9 @@ int ubi_thread(void *u)
  */
 static void shutdown_work(struct ubi_device *ubi)
 {
+#ifdef CONFIG_MTD_UBI_FASTMAP
+	flush_work(&ubi->fm_work);
+#endif
 	while (!list_empty(&ubi->works)) {
 		struct ubi_work *wrk;