staging:iio:buffer stop allowing for read_last callback.

No longer needed now we don't allow sysfs acccess to buffer data.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/buffer.h b/drivers/staging/iio/buffer.h
index 98e9efa..7272333 100644 (file)
--- a/drivers/staging/iio/buffer.h
+++ b/drivers/staging/iio/buffer.h
@@ -21,7 +21,6 @@ struct iio_buffer;
  * @mark_in_use:       reference counting, typically to prevent module removal
  * @unmark_in_use:     reduce reference count when no longer using buffer
  * @store_to:          actually store stuff to the buffer
- * @read_last:         get the last element stored
  * @read_first_n:      try to get a specified number of elements (must exist)
  * @mark_param_change: notify buffer that some relevant parameter has changed
  *                     Often this means the underlying storage may need to
@@ -48,7 +47,6 @@ struct iio_buffer_access_funcs {
        void (*unmark_in_use)(struct iio_buffer *buffer);
 
        int (*store_to)(struct iio_buffer *buffer, u8 *data, s64 timestamp);
-       int (*read_last)(struct iio_buffer *buffer, u8 *data);
        int (*read_first_n)(struct iio_buffer *buffer,
                            size_t n,
                            char __user *buf);