[PATCH 06/46] staging: comedi: me4000: remove 'board' from me4000_ai_check_chanlist()

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The maximum differential channel is half the subdevice 'n_chan'. Use
that instead and remove the need for the 'board' variable.

Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
---
 drivers/staging/comedi/drivers/me4000.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/comedi/drivers/me4000.c b/drivers/staging/comedi/drivers/me4000.c
index a1b30f9..2243e64 100644
--- a/drivers/staging/comedi/drivers/me4000.c
+++ b/drivers/staging/comedi/drivers/me4000.c
@@ -562,8 +562,6 @@ static int me4000_ai_check_chanlist(struct comedi_device *dev,
 				    struct comedi_subdevice *s,
 				    struct comedi_cmd *cmd)
 {
-	const struct me4000_board *board = dev->board_ptr;
-	unsigned int max_diff_chan = board->ai_diff_nchan;
 	unsigned int aref0 = CR_AREF(cmd->chanlist[0]);
 	int i;
 
@@ -579,7 +577,7 @@ static int me4000_ai_check_chanlist(struct comedi_device *dev,
 		}
 
 		if (aref == AREF_DIFF) {
-			if (chan >= max_diff_chan) {
+			if (chan >= (s->n_chan / 2)) {
 				dev_dbg(dev->class_dev,
 					"Channel number to high\n");
 				return -EINVAL;
-- 
2.4.3

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