From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757541AbbFQXkQ (ORCPT ); Wed, 17 Jun 2015 19:40:16 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:34713 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932407AbbFQWZN (ORCPT ); Wed, 17 Jun 2015 18:25:13 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Alban Bedel , Jonathan Cameron , Kamal Mostafa Subject: [PATCH 3.19.y-ckt 026/146] iio:st_sensors: Fix oops when probing SPI devices Date: Wed, 17 Jun 2015 15:22:11 -0700 Message-Id: <1434579851-1719-27-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1434579851-1719-1-git-send-email-kamal@canonical.com> References: <1434579851-1719-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.19 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.19.8-ckt2 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alban Bedel commit 8e71c04f863a1754f21b27fb8ecb773d680a0a80 upstream. In SPI mode the transfer buffer is locked with a mutex. However this mutex is only initilized after the probe, but some transfer needs to be done in the probe. To fix this bug we move the mutex initialization at the beginning of the device probe. Signed-off-by: Alban Bedel Acked-by: Denis Ciocca Signed-off-by: Jonathan Cameron Signed-off-by: Kamal Mostafa --- drivers/iio/accel/st_accel_core.c | 1 + drivers/iio/common/st_sensors/st_sensors_core.c | 2 -- drivers/iio/gyro/st_gyro_core.c | 1 + drivers/iio/magnetometer/st_magn_core.c | 1 + drivers/iio/pressure/st_pressure_core.c | 1 + 5 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/iio/accel/st_accel_core.c b/drivers/iio/accel/st_accel_core.c index 53f3262..6805db0 100644 --- a/drivers/iio/accel/st_accel_core.c +++ b/drivers/iio/accel/st_accel_core.c @@ -465,6 +465,7 @@ int st_accel_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &accel_info; + mutex_init(&adata->tb.buf_lock); st_sensors_power_enable(indio_dev); diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c index edd13d2..8dd0477 100644 --- a/drivers/iio/common/st_sensors/st_sensors_core.c +++ b/drivers/iio/common/st_sensors/st_sensors_core.c @@ -304,8 +304,6 @@ int st_sensors_init_sensor(struct iio_dev *indio_dev, struct st_sensors_platform_data *of_pdata; int err = 0; - mutex_init(&sdata->tb.buf_lock); - /* If OF/DT pdata exists, it will take precedence of anything else */ of_pdata = st_sensors_of_probe(indio_dev->dev.parent, pdata); if (of_pdata) diff --git a/drivers/iio/gyro/st_gyro_core.c b/drivers/iio/gyro/st_gyro_core.c index f07a233..566f7d2 100644 --- a/drivers/iio/gyro/st_gyro_core.c +++ b/drivers/iio/gyro/st_gyro_core.c @@ -317,6 +317,7 @@ int st_gyro_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &gyro_info; + mutex_init(&gdata->tb.buf_lock); st_sensors_power_enable(indio_dev); diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c index 8ade473..2e56f81 100644 --- a/drivers/iio/magnetometer/st_magn_core.c +++ b/drivers/iio/magnetometer/st_magn_core.c @@ -369,6 +369,7 @@ int st_magn_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &magn_info; + mutex_init(&mdata->tb.buf_lock); st_sensors_power_enable(indio_dev); diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c index 97baf40d..e881fa6 100644 --- a/drivers/iio/pressure/st_pressure_core.c +++ b/drivers/iio/pressure/st_pressure_core.c @@ -417,6 +417,7 @@ int st_press_common_probe(struct iio_dev *indio_dev) indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &press_info; + mutex_init(&press_data->tb.buf_lock); st_sensors_power_enable(indio_dev); -- 1.9.1