diff options
| author | Lars-Peter Clausen | 2013-11-25 12:42:00 +0000 |
|---|---|---|
| committer | Jonathan Cameron | 2013-12-03 20:22:28 +0000 |
| commit | 112b0b79b2e7a552e8afe19fdddbacef734649f8 (patch) | |
| tree | a68f302745422c4663b3b0be853bea7a3b842b37 | |
| parent | d4adb07c7ad56283419170afe2cf5d868635e9d4 (diff) | |
staging:iio:ad7746: Do not store the transfer buffer on the stack
Some I2C controllers might not be able to handle transfer buffers that are
stored on stack.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/staging/iio/cdc/ad7746.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c index 01e15e2f3f50..cbb1588d591f 100644 --- a/drivers/staging/iio/cdc/ad7746.c +++ b/drivers/staging/iio/cdc/ad7746.c @@ -105,6 +105,11 @@ struct ad7746_chip_info { u8 vt_setup; u8 capdac[2][2]; s8 capdac_set; + + union { + __be32 d32; + u8 d8[4]; + } data ____cacheline_aligned; }; enum ad7746_chan { @@ -566,11 +571,6 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, int ret, delay; u8 regval, reg; - union { - __be32 d32; - u8 d8[4]; - } data; - mutex_lock(&indio_dev->mlock); switch (mask) { @@ -591,12 +591,12 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, /* Now read the actual register */ ret = i2c_smbus_read_i2c_block_data(chip->client, - chan->address >> 8, 3, &data.d8[1]); + chan->address >> 8, 3, &chip->data.d8[1]); if (ret < 0) goto out; - *val = (be32_to_cpu(data.d32) & 0xFFFFFF) - 0x800000; + *val = (be32_to_cpu(chip->data.d32) & 0xFFFFFF) - 0x800000; switch (chan->type) { case IIO_TEMP: |