[d-kernel] [PATCH un-def/sisyphus] phy: rockchip-inno-usb2: Return zero after otg sync

[Vitaly Chikunov]

From: Peter Geis <pgwipeout at gmail.com>

The otg sync state patch reuses the ret variable, but fails to set it to
zero after use. This leads to a situation when the otg port is in
peripheral mode where the otg phy aborts halfway through setup.  It also
fails to account for a failure to register the extcon notifier. Fix this
by using our own variable and skipping otg sync in case of failure.

Fixes: 8dc60f8da22f ("phy: rockchip-inno-usb2: Sync initial otg state")
Reported-by: Markus Reichl <m.reichl at fivetechno.de>
Reported-by: Michael Riesch <michael.riesch at wolfvision.net>
Signed-off-by: Peter Geis <pgwipeout at gmail.com>
Tested-by: Michael Riesch <michael.riesch at wolfvision.net>
Tested-by: Markus Reichl <m.reichl at fivetechno.de>
Reviewed-by: Samuel Holland <samuel at sholland.org>
Link: https://lore.kernel.org/r/20220902184543.1234835-1-pgwipeout@gmail.com
Link: https://bugzilla.altlinux.org/43732
Signed-off-by: Vitaly Chikunov <vt at altlinux.org>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 5223d4c9afdf..39f14a5b78cd 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -1124,7 +1124,7 @@ static int rockchip_usb2phy_otg_port_init(struct rockchip_usb2phy *rphy,
 					  struct rockchip_usb2phy_port *rport,
 					  struct device_node *child_np)
 {
-	int ret;
+	int ret, id;
 
 	rport->port_id = USB2PHY_PORT_OTG;
 	rport->port_cfg = &rphy->phy_cfg->port_cfgs[USB2PHY_PORT_OTG];
@@ -1162,13 +1162,15 @@ static int rockchip_usb2phy_otg_port_init(struct rockchip_usb2phy *rphy,
 
 		ret = devm_extcon_register_notifier(rphy->dev, rphy->edev,
 					EXTCON_USB_HOST, &rport->event_nb);
-		if (ret)
+		if (ret) {
 			dev_err(rphy->dev, "register USB HOST notifier failed\n");
+			goto out;
+		}
 
 		if (!of_property_read_bool(rphy->dev->of_node, "extcon")) {
 			/* do initial sync of usb state */
-			ret = property_enabled(rphy->grf, &rport->port_cfg->utmi_id);
-			extcon_set_state_sync(rphy->edev, EXTCON_USB_HOST, !ret);
+			id = property_enabled(rphy->grf, &rport->port_cfg->utmi_id);
+			extcon_set_state_sync(rphy->edev, EXTCON_USB_HOST, !id);
 		}
 	}
 
-- 
2.33.4