From 31a847e6e1ed4db5002a4af191988aa85008c407 Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Thu, 14 Nov 2013 16:18:23 +0000 Subject: extcon: arizona: Fix race with microphone detection and removal The microphone detection code is run as delayed work to provide additional debounce, it is possible that the jack could have been removed by the time we process the microphone detection. Turn this case into a no op. Signed-off-by: Charles Keepax Signed-off-by: Chanwoo Choi --- drivers/extcon/extcon-arizona.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers') diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index fefb8563db9e..f36debffe6e8 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -780,6 +780,19 @@ static void arizona_micd_detect(struct work_struct *work) mutex_lock(&info->lock); + /* If the cable was removed while measuring ignore the result */ + ret = extcon_get_cable_state_(&info->edev, ARIZONA_CABLE_MECHANICAL); + if (ret < 0) { + dev_err(arizona->dev, "Failed to check cable state: %d\n", + ret); + mutex_unlock(&info->lock); + return; + } else if (!ret) { + dev_dbg(arizona->dev, "Ignoring MICDET for removed cable\n"); + mutex_unlock(&info->lock); + return; + } + for (i = 0; i < 10 && !(val & MICD_LVL_0_TO_8); i++) { ret = regmap_read(arizona->regmap, ARIZONA_MIC_DETECT_3, &val); if (ret != 0) { -- cgit v1.2.3