From: Preetham Chandru <pchandru@nvidia.com>
To: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Stephen Warren <swarren@nvidia.com>,
Lars-Peter Clausen <lars@metafoo.de>,
Andrew Chew <achew@nvidia.com>,
linux-iio@vger.kernel.org, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org,
Preetham Chandru <pchandru@nvidia.com>,
Laxman Dewangan <ldewangan@nvidia.com>
Subject: [PATCH] staging: iio: ak8975: Remove i2c client data corruption
Date: Mon, 9 Apr 2012 18:05:01 +0530 [thread overview]
Message-ID: <1333974901-24282-1-git-send-email-pchandru@nvidia.com> (raw)
i2c client data set is of type struct indio_dev pointer and hence the
pointer returned from i2c_get_clientdata() should be assigned to
an object of type struct indio_dev and not to an object of type
struct ak8975_data.
Also in ak8975_probe() client data should be set first
before calling ak8975_setup() as it references the client data.
Signed-off-by: Preetham Chandru R <pchandru@nvidia.com>
CC: Laxman Dewangan <ldewangan@nvidia.com>
---
drivers/staging/iio/magnetometer/ak8975.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/iio/magnetometer/ak8975.c b/drivers/staging/iio/magnetometer/ak8975.c
index d5ddac3..ebc2d08 100644
--- a/drivers/staging/iio/magnetometer/ak8975.c
+++ b/drivers/staging/iio/magnetometer/ak8975.c
@@ -108,7 +108,8 @@ static const int ak8975_index_to_reg[] = {
static int ak8975_write_data(struct i2c_client *client,
u8 reg, u8 val, u8 mask, u8 shift)
{
- struct ak8975_data *data = i2c_get_clientdata(client);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct ak8975_data *data = iio_priv(indio_dev);
u8 regval;
int ret;
@@ -159,7 +160,8 @@ static int ak8975_read_data(struct i2c_client *client,
*/
static int ak8975_setup(struct i2c_client *client)
{
- struct ak8975_data *data = i2c_get_clientdata(client);
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct ak8975_data *data = iio_priv(indio_dev);
u8 device_id;
int ret;
@@ -509,6 +511,7 @@ static int ak8975_probe(struct i2c_client *client,
goto exit_gpio;
}
data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
/* Perform some basic start-of-day setup of the device. */
err = ak8975_setup(client);
if (err < 0) {
@@ -516,7 +519,6 @@ static int ak8975_probe(struct i2c_client *client,
goto exit_free_iio;
}
- i2c_set_clientdata(client, indio_dev);
data->client = client;
mutex_init(&data->lock);
data->eoc_irq = client->irq;
--
1.7.0.4
reply other threads:[~2012-04-09 12:36 UTC|newest]
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