From: Daniel Hung-yu Wu <h...@google.com>

Reboot or shutdown during delayed works could corrupt communication with
EC and certain I2C controller may not be able to recover from the error
state.

This patch registers a shutdown callback used to cancel the debugfs log
worker thread.

Signed-off-by: Daniel Hung-yu Wu <h...@chromium.org>
Signed-off-by: Thierry Escande <thierry.esca...@collabora.com>
---
 drivers/platform/chrome/cros_ec_dev.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_dev.c 
b/drivers/platform/chrome/cros_ec_dev.c
index 2571f5e..225d8e9 100644
--- a/drivers/platform/chrome/cros_ec_dev.c
+++ b/drivers/platform/chrome/cros_ec_dev.c
@@ -460,6 +460,14 @@ static int ec_device_remove(struct platform_device *pdev)
        return 0;
 }
 
+static void ec_device_shutdown(struct platform_device *pdev)
+{
+       struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
+
+       /* Be sure to clear up debugfs delayed works */
+       cros_ec_debugfs_remove(ec);
+}
+
 static const struct platform_device_id cros_ec_id[] = {
        { "cros-ec-ctl", 0 },
        { /* sentinel */ },
@@ -502,6 +510,7 @@ static struct platform_driver cros_ec_dev_driver = {
        },
        .probe = ec_device_probe,
        .remove = ec_device_remove,
+       .shutdown = ec_device_shutdown,
 };
 
 static int __init cros_ec_dev_init(void)
-- 
2.7.4

Reply via email to