changed prototype of comedi_buf_get a bit

diff --git a/include/linux/comedidev.h b/include/linux/comedidev.h
index 62a73237c72599dc9bd0fda3acf5d3d6ec145351..5df9e90878bac7ae6e5bcc04aa95f7b706de275c 100644 (file)
--- a/include/linux/comedidev.h
+++ b/include/linux/comedidev.h
@@ -304,15 +304,13 @@ static inline void comedi_buf_put(comedi_async *async, sampl_t x)
 }
 
 /* Reads a data point from comedi's buffer, used for output.
- * returns signed int so error can be returned as negative. */
-static inline int comedi_buf_get(comedi_async *async)
+ * returns negative value on error. */
+static inline int comedi_buf_get(comedi_async *async, sampl_t *x)
 {
-       sampl_t data;
-
        if(async->buf_int_count == async->buf_user_count)
                return -EAGAIN;
 
-       data = *(sampl_t *)(async->data + async->buf_int_ptr);
+       *x = *(sampl_t *)(async->data + async->buf_int_ptr);
        async->buf_int_ptr += sizeof(sampl_t);
        if(async->buf_int_ptr >= async->data_len){
                async->buf_int_ptr = 0;
@@ -324,7 +322,7 @@ static inline int comedi_buf_get(comedi_async *async)
        }
        async->buf_int_count += sizeof(sampl_t);
 
-       return data;
+       return 0;
 }
 
 #ifdef LINUX_V20