linux-kernel - [PATCH 5.12 097/173] usb: typec: intel_pmc_mux: Put fwnode in error case during ->probe()

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Message-Id: <20210614102701.394133903@linuxfoundation.org>
Date:   Mon, 14 Jun 2021 12:27:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH 5.12 097/173] usb: typec: intel_pmc_mux: Put fwnode in error case during ->probe()

From: Andy Shevchenko <andy.shevchenko@...il.com>

commit 1a85b350a7741776a406005b943e3dec02c424ed upstream.

device_get_next_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

Fixes: 6701adfa9693 ("usb: typec: driver for Intel PMC mux control")
Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Signed-off-by: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20210607205007.71458-1-andy.shevchenko@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/typec/mux/intel_pmc_mux.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -636,8 +636,10 @@ static int pmc_usb_probe(struct platform
 			break;
 
 		ret = pmc_usb_register_port(pmc, i, fwnode);
-		if (ret)
+		if (ret) {
+			fwnode_handle_put(fwnode);
 			goto err_remove_ports;
+		}
 	}
 
 	platform_set_drvdata(pdev, pmc);