linux-kernel - [PATCH 3/4] eeprom: at24: provide and use a helper for releasing dummy i2c clients

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Date:   Tue, 10 Apr 2018 15:12:05 +0200
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Andy Shevchenko <andy.shevchenko@...il.com>,
        Peter Rosin <peda@...ntia.se>,
        Sven Van Asbroeck <svendev@...x.com>
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH 3/4] eeprom: at24: provide and use a helper for releasing dummy i2c clients

This allows us to drop two opencoded for loops. We also don't need to
check if the i2c client is NULL before calling i2c_unregister_device().

Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>
---
 drivers/misc/eeprom/at24.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 5e56a99435c6..c57eaea181d8 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -532,6 +532,14 @@ static int at24_get_pdata(struct device *dev, struct at24_platform_data *pdata)
 	return 0;
 }
 
+static void at24_remove_dummy_clients(struct at24_data *at24)
+{
+	int i;
+
+	for (i = 1; i < at24->num_addresses; i++)
+		i2c_unregister_device(at24->client[i].client);
+}
+
 static unsigned int at24_get_offset_adj(u8 flags, unsigned int byte_len)
 {
 	if (flags & AT24_FLAG_MAC) {
@@ -702,10 +710,7 @@ static int at24_probe(struct i2c_client *client)
 	return 0;
 
 err_clients:
-	for (i = 1; i < num_addresses; i++)
-		if (at24->client[i].client)
-			i2c_unregister_device(at24->client[i].client);
-
+	at24_remove_dummy_clients(at24);
 	pm_runtime_disable(dev);
 
 	return err;
@@ -714,13 +719,10 @@ static int at24_probe(struct i2c_client *client)
 static int at24_remove(struct i2c_client *client)
 {
 	struct at24_data *at24;
-	int i;
 
 	at24 = i2c_get_clientdata(client);
 
-	for (i = 1; i < at24->num_addresses; i++)
-		i2c_unregister_device(at24->client[i].client);
-
+	at24_remove_dummy_clients(at24);
 	pm_runtime_disable(&client->dev);
 	pm_runtime_set_suspended(&client->dev);
 
-- 
2.17.0