Made some changes to async buffer, to better accommodate output dma

[comedi.git] / comedi / drivers / comedi_fc.c

diff --git a/comedi/drivers/comedi_fc.c b/comedi/drivers/comedi_fc.c
index 629c4b6c8593b650ca48bb79faff25ee5f87481f..d0f7abf22e4e718f8efd20c4f79dfa16e9167231 100644 (file)
--- a/comedi/drivers/comedi_fc.c
+++ b/comedi/drivers/comedi_fc.c
@@ -32,7 +32,7 @@ static inline unsigned int bytes_per_scan( comedi_subdevice *subd )
 {
        int num_samples;
        int bits_per_sample;
-       
+
        switch( subd->type )
        {
                case COMEDI_SUBD_DI:
@@ -90,16 +90,10 @@ unsigned int cfc_read_array_from_buffer( comedi_subdevice *subd, void *data,
        unsigned int num_bytes )
 {
        comedi_async *async = subd->async;
-       unsigned int bytes_available;
 
        if( num_bytes == 0 ) return 0;
 
-       bytes_available = comedi_buf_read_n_available(subd);
-       if( bytes_available < num_bytes )
-       {
-               num_bytes = bytes_available;
-       }
-
+       num_bytes = comedi_buf_read_alloc(async, num_bytes);
        comedi_buf_memcpy_from( async, 0, data, num_bytes);
        comedi_buf_read_free( async, num_bytes );
        increment_scan_progress( subd, num_bytes );