iio:bma180: Drop _update_scan_mode()

statically allocate maximum size

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Cc: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/accel/bma180.c b/drivers/iio/accel/bma180.c
index 91260a071fe96067e095b643a2f96dbe95c30354..583831898247f6edff071292f868d4d3e3aea4fe 100644 (file)
--- a/drivers/iio/accel/bma180.c
+++ b/drivers/iio/accel/bma180.c
@@ -82,7 +82,7 @@ struct bma180_data {
        int scale;
        int bw;
        bool pmode;
-       char *buff;
+       u8 buff[16]; /* 3x 16-bit + 8-bit + padding + timestamp */
 };
 
 enum bma180_chan {
@@ -408,26 +408,10 @@ static int bma180_write_raw(struct iio_dev *indio_dev,
        }
 }
 
-static int bma180_update_scan_mode(struct iio_dev *indio_dev,
-               const unsigned long *scan_mask)
-{
-       struct bma180_data *data = iio_priv(indio_dev);
-
-       if (data->buff)
-               devm_kfree(&indio_dev->dev, data->buff);
-       data->buff = devm_kzalloc(&indio_dev->dev,
-                       indio_dev->scan_bytes, GFP_KERNEL);
-       if (!data->buff)
-               return -ENOMEM;
-
-       return 0;
-}
-
 static const struct iio_info bma180_info = {
        .attrs                  = &bma180_attrs_group,
        .read_raw               = bma180_read_raw,
        .write_raw              = bma180_write_raw,
-       .update_scan_mode       = bma180_update_scan_mode,
        .driver_module          = THIS_MODULE,
 };