[PATCH v4 2/2] reset: gpio: Set can_sleep for the shared reset serialization

[shengjiu . wang]

From: Shengjiu Wang <shengjiu.wang@xxxxxxx>

reset-gpio drives the line with gpiod_set_value_cansleep(), so its reset
ops may sleep. Set reset_controller_dev::can_sleep so the core serializes
the shared refcount update and the hardware op under its per-control mutex,
preventing a concurrent consumer from returning before the op has finished.

Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
---
 drivers/reset/reset-gpio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/reset/reset-gpio.c b/drivers/reset/reset-gpio.c
index bf95296a512e..b4a198792107 100644
--- a/drivers/reset/reset-gpio.c
+++ b/drivers/reset/reset-gpio.c
@@ -67,6 +67,7 @@ static int reset_gpio_probe(struct auxiliary_device *adev,
 				     "Could not get reset gpios\n");
 
 	priv->rc.ops = &reset_gpio_ops;
+	priv->rc.can_sleep = true;
 	priv->rc.owner = THIS_MODULE;
 	priv->rc.dev = dev;
 
-- 
2.34.1