linux-kernel - [PATCH v2 1/2] extcon: ptn5150: add queue work sync before driver release

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Date:   Tue, 19 Apr 2022 15:43:21 +0800
From:   Li Jun <jun.li@....com>
To:     myungjoo.ham@...sung.com, cw00.choi@...sung.com, krzk@...nel.org
Cc:     linux-kernel@...r.kernel.org, frank.li@....com, xu.yang_2@....com
Subject: [PATCH v2 1/2] extcon: ptn5150: add queue work sync before driver release

Add device managed action to sync pending queue work, otherwise
the queued work may run after the work is destroyed.

Signed-off-by: Li Jun <jun.li@....com>
---
- new patch

 drivers/extcon/extcon-ptn5150.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
index 5b9a3cf8df26..2a7874108df8 100644
--- a/drivers/extcon/extcon-ptn5150.c
+++ b/drivers/extcon/extcon-ptn5150.c
@@ -194,6 +194,13 @@ static int ptn5150_init_dev_type(struct ptn5150_info *info)
 	return 0;
 }
 
+static void ptn5150_work_sync_and_put(void *data)
+{
+	struct ptn5150_info *info = data;
+
+	cancel_work_sync(&info->irq_work);
+}
+
 static int ptn5150_i2c_probe(struct i2c_client *i2c)
 {
 	struct device *dev = &i2c->dev;
@@ -284,6 +291,10 @@ static int ptn5150_i2c_probe(struct i2c_client *i2c)
 	if (ret)
 		return -EINVAL;
 
+	ret = devm_add_action_or_reset(dev, ptn5150_work_sync_and_put, info);
+	if (ret)
+		return ret;
+
 	/*
 	 * Update current extcon state if for example OTG connection was there
 	 * before the probe
-- 
2.25.1