staging: dgap: remove useless a variable within board_t

The use_interrupts is used only in dagp_request_irq() for checking
a value from user config file. It doesn't need in board_t struct.
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgap/dgap.c

@@ -837,12 +837,10 @@ static int dgap_request_irq(struct board_t *brd)
 	if (!brd || brd->magic != DGAP_BOARD_MAGIC)
 		return -ENODEV;
 
-	brd->use_interrupts = dgap_config_get_useintr(brd);
-
 	/*
 	 * Set up our interrupt handler if we are set to do interrupts.
 	 */
-	if (brd->use_interrupts && brd->irq) {
+	if (dgap_config_get_useintr(brd) && brd->irq) {
 
 		rc = request_irq(brd->irq, dgap_intr, IRQF_SHARED, "DGAP", brd);
 

drivers/staging/dgap/dgap.h

@@ -558,7 +558,6 @@ struct board_t {
 
 	u16		nasync;		/* Number of ports on card */
 
-	u32		use_interrupts;	/* Should we be interrupt driven? */
 	ulong		irq;		/* Interrupt request number */
 	ulong		intr_count;	/* Count of interrupts */
 	u32		intr_used;	/* Non-zero if using interrupts */