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wl1251: fix crash on remove due to leftover work item
commit 4c1bcdb5a3354b250b82a67549f57ac27a3bb85f upstream. This driver currently leaves elp_work behind when stopping, which occasionally results in data corruption because work function ends up accessing freed memory, typical symptoms of this are various worker_thread crashes. Fix it by cancelling elp_work. Signed-off-by: Grazvydas Ignotas <email@example.com> Signed-off-by: John W. Linville <firstname.lastname@example.org> Signed-off-by: Greg Kroah-Hartman <email@example.com>
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