linux-kernel - [PATCH 15/15] usb: typec: tcpm/tcpci_maxim: use device managed TCPCI port deregistration

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Message-Id: <20240710-tcpc-cleanup-v1-15-0ec1f41f4263@linaro.org>
Date: Wed, 10 Jul 2024 11:36:22 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Peter Griffin <peter.griffin@...aro.org>, 
 Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, 
 Badhri Jagan Sridharan <badhri@...gle.com>, kernel-team@...roid.com, 
 linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>
Subject: [PATCH 15/15] usb: typec: tcpm/tcpci_maxim: use device managed
 TCPCI port deregistration

Instead of open-coding the call to tcpci_unregister_port() in various
places, let's just register a hook using devm_add_action_or_reset() so
that it gets called automatically as and when necessary by the device
management APIs.

Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
 drivers/usb/typec/tcpm/tcpci_maxim_core.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpci_maxim_core.c b/drivers/usb/typec/tcpm/tcpci_maxim_core.c
index ee3e86797f17..7abfd29b4b01 100644
--- a/drivers/usb/typec/tcpm/tcpci_maxim_core.c
+++ b/drivers/usb/typec/tcpm/tcpci_maxim_core.c
@@ -472,6 +472,11 @@ static bool max_tcpci_attempt_vconn_swap_discovery(struct tcpci *tcpci, struct t
 	return true;
 }
 
+static void max_tcpci_unregister_tcpci_port(void *tcpci)
+{
+	tcpci_unregister_port(tcpci);
+}
+
 static int max_tcpci_probe(struct i2c_client *client)
 {
 	int ret;
@@ -515,27 +520,21 @@ static int max_tcpci_probe(struct i2c_client *client)
 		return dev_err_probe(&client->dev, PTR_ERR(chip->tcpci),
 				     "TCPCI port registration failed\n");
 
+        ret = devm_add_action_or_reset(&client->dev,
+				       max_tcpci_unregister_tcpci_port,
+				       chip->tcpci);
+        if (ret)
+                return ret;
+
 	chip->port = tcpci_get_tcpm_port(chip->tcpci);
+
 	ret = max_tcpci_init_alert(chip, client);
 	if (ret < 0)
-		goto unreg_port;
+		return dev_err_probe(&client->dev, ret,
+				     "IRQ initialization failed\n");
 
 	device_init_wakeup(chip->dev, true);
 	return 0;
-
-unreg_port:
-	tcpci_unregister_port(chip->tcpci);
-
-	return dev_err_probe(&client->dev, ret,
-			     "Maxim TCPCI driver initialization failed\n");
-}
-
-static void max_tcpci_remove(struct i2c_client *client)
-{
-	struct max_tcpci_chip *chip = i2c_get_clientdata(client);
-
-	if (!IS_ERR_OR_NULL(chip->tcpci))
-		tcpci_unregister_port(chip->tcpci);
 }
 
 static const struct i2c_device_id max_tcpci_id[] = {
@@ -558,7 +557,6 @@ static struct i2c_driver max_tcpci_i2c_driver = {
 		.of_match_table = of_match_ptr(max_tcpci_of_match),
 	},
 	.probe = max_tcpci_probe,
-	.remove = max_tcpci_remove,
 	.id_table = max_tcpci_id,
 };
 module_i2c_driver(max_tcpci_i2c_driver);

-- 
2.45.2.803.g4e1b14247a-goog