From: Hauke Mehrtens <hauke.mehrtens@xxxxxxxxxx> The PMU register are accessed in a non atomic way and they could be accessed by different threads simultaneously, which could cause problems, this patch adds locking around the PMU registers. In addition this patch makes the function deactivating the PMU register wait till this setting is applied. Signed-off-by: Hauke Mehrtens <hauke.mehrtens@xxxxxxxxxx> --- arch/mips/lantiq/xway/sysctrl.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/mips/lantiq/xway/sysctrl.c b/arch/mips/lantiq/xway/sysctrl.c index c73ea3f..7c2ddbd 100644 --- a/arch/mips/lantiq/xway/sysctrl.c +++ b/arch/mips/lantiq/xway/sysctrl.c @@ -4,6 +4,8 @@ * by the Free Software Foundation. * * Copyright (C) 2011-2012 John Crispin <blogic@xxxxxxxxxxx> + * Copyright (C) 2013 Lei Chuanhua <Chuanhua.lei@xxxxxxxxxx> + * Copyright (C) 2015 Hauke Mehrtens <hauke.mehrtens@xxxxxxxxxx> */ #include <linux/ioport.h> -- 2.6.1
