When the pwm driver is unbound, the pwm_bl driver would still hold a
reference to that pwm, and crash the kernel later(if someone trying
to access that invalid pwm).
Add a device link to avoid this.
Signed-off-by: Jeffy Chen <jeffy.c...@rock-chips.com>
---
Changes in v2: None
drivers/video/backlight/pwm_bl.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 9bd17682655a..a76f147a26e7 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -328,6 +328,8 @@ static int pwm_backlight_probe(struct platform_device *pdev)
goto err_alloc;
}
+ device_link_add(&pdev->dev, pb->pwm->chip->dev, DL_FLAG_AUTOREMOVE);
+
dev_dbg(&pdev->dev, "got pwm for backlight\n");
/*
--
2.11.0
