staging: comedi: comedi_buf: comedi_buf_memcpy_to() remove 'offset' param

This parameter is always passed as '0'. Remove the unnecessary parameter.

This allows removing the unnecessary check of the write_ptr overflow.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/comedi_buf.c b/drivers/staging/comedi/comedi_buf.c
index 0e4727d..c60fa1a 100644 (file)
--- a/drivers/staging/comedi/comedi_buf.c
+++ b/drivers/staging/comedi/comedi_buf.c
@@ -443,14 +443,10 @@ int comedi_buf_put(struct comedi_subdevice *s, unsigned short x)
 EXPORT_SYMBOL_GPL(comedi_buf_put);
 
 static void comedi_buf_memcpy_to(struct comedi_subdevice *s,
-                                unsigned int offset,
                                 const void *data, unsigned int num_bytes)
 {
        struct comedi_async *async = s->async;
-       unsigned int write_ptr = async->buf_write_ptr + offset;
-
-       if (write_ptr >= async->prealloc_bufsz)
-               write_ptr %= async->prealloc_bufsz;
+       unsigned int write_ptr = async->buf_write_ptr;
 
        while (num_bytes) {
                unsigned int block_size;
@@ -526,7 +522,7 @@ unsigned int comedi_write_array_to_buffer(struct comedi_subdevice *s,
                return 0;
        }
 
-       comedi_buf_memcpy_to(s, 0, data, num_bytes);
+       comedi_buf_memcpy_to(s, data, num_bytes);
        comedi_buf_write_free(s, num_bytes);
        comedi_inc_scan_progress(s, num_bytes);
        async->events |= COMEDI_CB_BLOCK;