From 950b6c2d110e8df65b9d2704cc7039f3d0d9f7b2 Mon Sep 17 00:00:00 2001 From: Matt Ranostay Date: Fri, 30 Sep 2016 21:45:30 -0700 Subject: [PATCH] power: supply: bq27xxx_battery: don't update poll_interval param if same To avoid canceling the delayed workqueue needlessly, and scheduling an immediate polling. Check if the new poll_interval value is different than the previous setting. Cc: Tony Lindgren Cc: Sebastian Reichel Signed-off-by: Matt Ranostay Signed-off-by: Sebastian Reichel --- drivers/power/supply/bq27xxx_battery.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c index 3b0dbc689d72..0c343a0c941e 100644 --- a/drivers/power/supply/bq27xxx_battery.c +++ b/drivers/power/supply/bq27xxx_battery.c @@ -397,10 +397,11 @@ static LIST_HEAD(bq27xxx_battery_devices); static int poll_interval_param_set(const char *val, const struct kernel_param *kp) { struct bq27xxx_device_info *di; + unsigned int prev_val = *(unsigned int *) kp->arg; int ret; ret = param_set_uint(val, kp); - if (ret < 0) + if (ret < 0 || prev_val == *(unsigned int *) kp->arg) return ret; mutex_lock(&bq27xxx_list_lock); -- 2.39.2