From: Andrea Merello <andrea.merello@gmail.com>
Date: Fri, 4 Oct 2019 15:53:32 +0200
Subject: net: phy: allow for reset line to be tied to a sleepy GPIO controller
Git-commit: ea977d19d918324ad5b66953f051a6ed07d0a3c5
Patch-mainline: 5.4-rc2
References: bnc#1151927 5.3.8

mdio_device_reset() makes use of the atomic-pretending API flavor for
handling the PHY reset GPIO line.

I found no hint that mdio_device_reset() is called from atomic context
and indeed it uses usleep_range() since long time, so I would assume that
it is OK to sleep there.

This patch switch to gpiod_set_value_cansleep() in mdio_device_reset().
This is relevant if e.g. the PHY reset line is tied to a I2C GPIO
controller.

This has been tested on a ZynqMP board running an upstream 4.19 kernel and
then hand-ported on current kernel tree.

Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/net/phy/mdio_device.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/phy/mdio_device.c
+++ b/drivers/net/phy/mdio_device.c
@@ -121,7 +121,7 @@ void mdio_device_reset(struct mdio_devic
 		return;
 
 	if (mdiodev->reset_gpio)
-		gpiod_set_value(mdiodev->reset_gpio, value);
+		gpiod_set_value_cansleep(mdiodev->reset_gpio, value);
 
 	if (mdiodev->reset_ctrl) {
 		if (value)