staging: comedi: dt2811: cleanup dev->board_name usage

This legacy driver does no additional probing so the dev->board_name
will already be properly initialized by the comedi core before calling
the (*attach) function.

Remove the unnecessary initialization of dev->board_name and use it
when requesting the resources instead of the open-coded strings.

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

drivers/staging/comedi/drivers/dt2811.c

@@ -50,8 +50,6 @@ Configuration options:
 
 #include <linux/ioport.h>
 
-static const char *driver_name = "dt2811";
-
 static const struct comedi_lrange range_dt2811_pgh_ai_5_unipolar = {
 	4, {
 		RANGE(0, 5),
@@ -407,13 +405,12 @@ static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 
 	printk(KERN_INFO "comedi%d: dt2811:base=0x%04lx\n", dev->minor, iobase);
 
-	if (!request_region(iobase, DT2811_SIZE, driver_name)) {
+	if (!request_region(iobase, DT2811_SIZE, dev->board_name)) {
 		printk(KERN_ERR "I/O port conflict\n");
 		return -EIO;
 	}
 
 	dev->iobase = iobase;
-	dev->board_name = board->name;
 
 #if 0
 	outb(0, dev->iobase + DT2811_ADCSR);
@@ -449,7 +446,7 @@ static int dt2811_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 			i = inb(dev->iobase + DT2811_ADDATHI);
 			printk(KERN_INFO "(irq = %d)\n", irq);
 			ret = request_irq(irq, dt2811_interrupt, 0,
-					  driver_name, dev);
+					  dev->board_name, dev);
 			if (ret < 0)
 				return -EIO;
 			dev->irq = irq;