https://sourceforge.net/p/linux-gpib/code/1901/

Index: linux-gpib-kernel/drivers/gpib/eastwood/fluke_gpib.c
===================================================================
--- linux-gpib-kernel/drivers/gpib/eastwood/fluke_gpib.c	(revision 1900)
+++ linux-gpib-kernel/drivers/gpib/eastwood/fluke_gpib.c	(revision 1901)
@@ -114,15 +114,15 @@
 	fluke_private_t *priv = board->private_data;
 	return nec7210_update_status( board, &priv->nec7210_priv, clear_mask );
 }
-void fluke_primary_address(gpib_board_t *board, unsigned int address)
+int fluke_primary_address(gpib_board_t *board, unsigned int address)
 {
 	fluke_private_t *priv = board->private_data;
-	nec7210_primary_address(board, &priv->nec7210_priv, address);
+	return nec7210_primary_address(board, &priv->nec7210_priv, address);
 }
-void fluke_secondary_address(gpib_board_t *board, unsigned int address, int enable)
+int fluke_secondary_address(gpib_board_t *board, unsigned int address, int enable)
 {
 	fluke_private_t *priv = board->private_data;
-	nec7210_secondary_address(board, &priv->nec7210_priv, address, enable);
+	return nec7210_secondary_address(board, &priv->nec7210_priv, address, enable);
 }
 int fluke_parallel_poll(gpib_board_t *board, uint8_t *result)
 {
Index: linux-gpib-kernel/drivers/gpib/fmh_gpib/fmh_gpib.c
===================================================================
--- linux-gpib-kernel/drivers/gpib/fmh_gpib/fmh_gpib.c	(revision 1900)
+++ linux-gpib-kernel/drivers/gpib/fmh_gpib/fmh_gpib.c	(revision 1901)
@@ -100,15 +100,15 @@
 	fmh_gpib_private_t *priv = board->private_data;
 	return nec7210_update_status( board, &priv->nec7210_priv, clear_mask );
 }
-void fmh_gpib_primary_address(gpib_board_t *board, unsigned int address)
+int fmh_gpib_primary_address(gpib_board_t *board, unsigned int address)
 {
 	fmh_gpib_private_t *priv = board->private_data;
-	nec7210_primary_address(board, &priv->nec7210_priv, address);
+	return nec7210_primary_address(board, &priv->nec7210_priv, address);
 }
-void fmh_gpib_secondary_address(gpib_board_t *board, unsigned int address, int enable)
+int fmh_gpib_secondary_address(gpib_board_t *board, unsigned int address, int enable)
 {
 	fmh_gpib_private_t *priv = board->private_data;
-	nec7210_secondary_address(board, &priv->nec7210_priv, address, enable);
+	return nec7210_secondary_address(board, &priv->nec7210_priv, address, enable);
 }
 int fmh_gpib_parallel_poll(gpib_board_t *board, uint8_t *result)
 {