staging: dgnc: Remove driver-wide polling counter variable

The polling counter variable is only exposed via sysfs and has no other
purpose.

Now, since the polling shall be implemented as a board specific feature
rather than being global in the driver this counter is obsolete.
Signed-off-by: Konrad Zapalowicz <bergo.torino@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_driver.c

@@ -90,7 +90,6 @@ static const struct file_operations dgnc_BoardFops = {
 uint			dgnc_NumBoards;
 struct dgnc_board		*dgnc_Board[MAXBOARDS];
 DEFINE_SPINLOCK(dgnc_global_lock);
-ulong			dgnc_poll_counter;
 uint			dgnc_Major;
 int			dgnc_poll_tick = 20;	/* Poll interval - 20 ms */
 
@@ -736,8 +735,6 @@ static void dgnc_poll_handler(ulong dummy)
 	int i;
 	unsigned long new_time;
 
-	dgnc_poll_counter++;
-
 	/* Go thru each board, kicking off a tasklet for each if needed */
 	for (i = 0; i < dgnc_NumBoards; i++) {
 		brd = dgnc_Board[i];

drivers/staging/dgnc/dgnc_driver.h

@@ -492,7 +492,6 @@ extern int		dgnc_trcbuf_size;	/* Size of the ringbuffer	*/
 extern spinlock_t	dgnc_global_lock;	/* Driver global spinlock	*/
 extern uint		dgnc_NumBoards;		/* Total number of boards	*/
 extern struct dgnc_board	*dgnc_Board[MAXBOARDS];	/* Array of board structs	*/
-extern ulong		dgnc_poll_counter;	/* Times the poller has run	*/
 extern char		*dgnc_state_text[];	/* Array of state text		*/
 
 #endif

drivers/staging/dgnc/dgnc_sysfs.c

@@ -63,14 +63,6 @@ static ssize_t dgnc_driver_maxboards_show(struct device_driver *ddp, char *buf)
 }
 static DRIVER_ATTR(maxboards, S_IRUSR, dgnc_driver_maxboards_show, NULL);
 
-
-static ssize_t dgnc_driver_pollcounter_show(struct device_driver *ddp, char *buf)
-{
-	return snprintf(buf, PAGE_SIZE, "%ld\n", dgnc_poll_counter);
-}
-static DRIVER_ATTR(pollcounter, S_IRUSR, dgnc_driver_pollcounter_show, NULL);
-
-
 static ssize_t dgnc_driver_debug_show(struct device_driver *ddp, char *buf)
 {
 	return snprintf(buf, PAGE_SIZE, "0x%x\n", dgnc_debug);
@@ -121,7 +113,6 @@ void dgnc_create_driver_sysfiles(struct pci_driver *dgnc_driver)
 	rc |= driver_create_file(driverfs, &driver_attr_debug);
 	rc |= driver_create_file(driverfs, &driver_attr_rawreadok);
 	rc |= driver_create_file(driverfs, &driver_attr_pollrate);
-	rc |= driver_create_file(driverfs, &driver_attr_pollcounter);
 	if (rc) {
 		printk(KERN_ERR "DGNC: sysfs driver_create_file failed!\n");
 	}
@@ -137,7 +128,6 @@ void dgnc_remove_driver_sysfiles(struct pci_driver *dgnc_driver)
 	driver_remove_file(driverfs, &driver_attr_debug);
 	driver_remove_file(driverfs, &driver_attr_rawreadok);
 	driver_remove_file(driverfs, &driver_attr_pollrate);
-	driver_remove_file(driverfs, &driver_attr_pollcounter);
 }