From: Richard Weinberger <richard@nod.at>
Date: Fri, 19 Sep 2014 15:37:56 +0000 (+0200)
Subject: UBI: Fix livelock in produce_free_peb()
X-Git-Tag: omap-for-v3.19/prcm-cleanup~74^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b91671bb23a79c32a23b0ad5d6e6ad292bb21bdf;p=pandora-kernel.git

UBI: Fix livelock in produce_free_peb()

The while loop in produce_free_peb() assumes that each work will produce a
free PEB. This is not true.
If ubi->works_count is 1 and the only scheduled work is the
wear_leveling_worker() produce_free_peb() can loop forever in case
nobody schedules an erase work.
Fix this issue by checking in the while loop whether work is scheduled.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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