linux-kernel - [PATCH v2 1/3] usb: typec: intel_pmc_mux: Put fwnode in error case during ->probe()

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Date:   Mon,  7 Jun 2021 23:50:05 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>
Subject: [PATCH v2 1/3] usb: typec: intel_pmc_mux: Put fwnode in error case during ->probe()

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>
Signed-off-by: Andy Shevchenko <andy.shevchenko@...il.com>
---
v2: moved put call into the conditional inside the loop (Heikki)
 drivers/usb/typec/mux/intel_pmc_mux.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index dc8689db0100..221aa1c0e77a 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -654,8 +654,10 @@ static int pmc_usb_probe(struct platform_device *pdev)
 			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);
-- 
2.32.0