From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.active-venture.com ([67.228.131.205]:60158 "EHLO mail.active-venture.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751485Ab2LXGZG (ORCPT ); Mon, 24 Dec 2012 01:25:06 -0500 From: Guenter Roeck To: linux-iio@vger.kernel.org, Jonathan Cameron Cc: linux-kernel@vger.kernel.org, Guenter Roeck Subject: [PATCH] iio: (max1363) Fix probe error path Date: Sun, 23 Dec 2012 22:24:58 -0800 Message-Id: <1356330298-11443-1-git-send-email-linux@roeck-us.net> Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org Instantiating the driver with no available regulator results in: [39711.686393] i2c i2c-7: new_device: Instantiated device max1139 at 0x35 [39711.688687] BUG: unable to handle kernel paging request at fffffffffffffe13 [39711.688734] IP: [] regulator_disable+0x1b/0x80 [39711.688788] PGD 1c0e067 PUD 1c0f067 PMD 0 [39711.688835] Oops: 0000 [#1] SMP Caused by bad probe error path. Fix it. Driver should also not attempt to free the interrupt in its error path if none was allocated. Fix that problem as well. Finally, testing if the regulator was allocated is not necessary in the remove function, since the probe function bails out if this is the case. Remove that check. Signed-off-by: Guenter Roeck --- drivers/iio/adc/max1363.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c index 1e84b5b..31f3485 100644 --- a/drivers/iio/adc/max1363.c +++ b/drivers/iio/adc/max1363.c @@ -1605,19 +1605,20 @@ static int __devinit max1363_probe(struct i2c_client *client, return 0; error_free_irq: - free_irq(st->client->irq, indio_dev); + if (client->irq) + free_irq(st->client->irq, indio_dev); error_uninit_buffer: iio_buffer_unregister(indio_dev); error_cleanup_buffer: max1363_buffer_cleanup(indio_dev); error_free_available_scan_masks: kfree(indio_dev->available_scan_masks); -error_unregister_map: - iio_map_array_unregister(indio_dev, client->dev.platform_data); error_disable_reg: regulator_disable(st->reg); error_put_reg: regulator_put(st->reg); +error_unregister_map: + iio_map_array_unregister(indio_dev, client->dev.platform_data); error_free_device: iio_device_free(indio_dev); error_out: @@ -1635,10 +1636,8 @@ static int __devexit max1363_remove(struct i2c_client *client) iio_buffer_unregister(indio_dev); max1363_buffer_cleanup(indio_dev); kfree(indio_dev->available_scan_masks); - if (!IS_ERR(st->reg)) { - regulator_disable(st->reg); - regulator_put(st->reg); - } + regulator_disable(st->reg); + regulator_put(st->reg); iio_map_array_unregister(indio_dev, client->dev.platform_data); iio_device_free(indio_dev); -- 1.7.9.7