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author | Wolfram Sang <wsa@sang-engineering.com> | 2014-06-06 14:35:45 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-06-06 16:08:07 -0700 |
commit | c67fedfab2d29de88a62282e0633d43329552703 (patch) | |
tree | ca0a5295450ec10e9ac6f13e23f318bcdce12f93 /drivers/rtc/rtc-m41t80.c | |
parent | 5028578595e761a3e418092e04db2ebf6c752a3f (diff) | |
download | linux-c67fedfab2d29de88a62282e0633d43329552703.tar.gz linux-c67fedfab2d29de88a62282e0633d43329552703.tar.bz2 linux-c67fedfab2d29de88a62282e0633d43329552703.zip |
drivers/rtc/rtc-m41t80.c: clean up error paths
There is no cleanup needed when something fails in probe, so no need for
goto. Directly return when something fails.
Signed-off-by: Wolfram Sang <wsa@sang-engineering.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-m41t80.c')
-rw-r--r-- | drivers/rtc/rtc-m41t80.c | 64 |
1 files changed, 23 insertions, 41 deletions
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index c287c6d5d1a9..86eccb15f524 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -627,37 +627,28 @@ static int m41t80_probe(struct i2c_client *client, struct m41t80_data *clientdata = NULL; if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C - | I2C_FUNC_SMBUS_BYTE_DATA)) { - rc = -ENODEV; - goto exit; - } + | I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; clientdata = devm_kzalloc(&client->dev, sizeof(*clientdata), GFP_KERNEL); - if (!clientdata) { - rc = -ENOMEM; - goto exit; - } + if (!clientdata) + return -ENOMEM; clientdata->features = id->driver_data; i2c_set_clientdata(client, clientdata); rtc = devm_rtc_device_register(&client->dev, client->name, &m41t80_rtc_ops, THIS_MODULE); - if (IS_ERR(rtc)) { - rc = PTR_ERR(rtc); - rtc = NULL; - goto exit; - } + if (IS_ERR(rtc)) + return PTR_ERR(rtc); clientdata->rtc = rtc; /* Make sure HT (Halt Update) bit is cleared */ rc = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_HOUR); - if (rc < 0) - goto ht_err; - if (rc & M41T80_ALHOUR_HT) { + if (rc >= 0 && rc & M41T80_ALHOUR_HT) { if (clientdata->features & M41T80_FEATURE_HT) { m41t80_get_datetime(client, &tm); dev_info(&client->dev, "HT bit was set!\n"); @@ -668,53 +659,44 @@ static int m41t80_probe(struct i2c_client *client, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); } - if (i2c_smbus_write_byte_data(client, - M41T80_REG_ALARM_HOUR, - rc & ~M41T80_ALHOUR_HT) < 0) - goto ht_err; + rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_HOUR, + rc & ~M41T80_ALHOUR_HT); + } + + if (rc < 0) { + dev_err(&client->dev, "Can't clear HT bit\n"); + return -EIO; } /* Make sure ST (stop) bit is cleared */ rc = i2c_smbus_read_byte_data(client, M41T80_REG_SEC); - if (rc < 0) - goto st_err; - if (rc & M41T80_SEC_ST) { - if (i2c_smbus_write_byte_data(client, M41T80_REG_SEC, - rc & ~M41T80_SEC_ST) < 0) - goto st_err; + if (rc >= 0 && rc & M41T80_SEC_ST) + rc = i2c_smbus_write_byte_data(client, M41T80_REG_SEC, + rc & ~M41T80_SEC_ST); + if (rc < 0) { + dev_err(&client->dev, "Can't clear ST bit\n"); + return -EIO; } rc = m41t80_sysfs_register(&client->dev); if (rc) - goto exit; + return rc; #ifdef CONFIG_RTC_DRV_M41T80_WDT if (clientdata->features & M41T80_FEATURE_HT) { save_client = client; rc = misc_register(&wdt_dev); if (rc) - goto exit; + return rc; rc = register_reboot_notifier(&wdt_notifier); if (rc) { misc_deregister(&wdt_dev); - goto exit; + return rc; } } #endif return 0; - -st_err: - rc = -EIO; - dev_err(&client->dev, "Can't clear ST bit\n"); - goto exit; -ht_err: - rc = -EIO; - dev_err(&client->dev, "Can't clear HT bit\n"); - goto exit; - -exit: - return rc; } static int m41t80_remove(struct i2c_client *client) |