staging: dgnc: remove useless variables

The dgnc_major_serial_registered and dgnc_major_serial_registered
do not need to use to check whether the tty driver is registered or not.
These variables are used only in dgnc_cleanup_tty() function,
This function will be called normally with initialized board structure.
It means the dgnc_cleanup_tty() cannot be called with unregistered tty.
Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/dgnc_driver.h

@@ -203,9 +203,6 @@ struct dgnc_board {
 	struct tty_driver *print_driver;
 	char		print_name[200];
 
-	bool		dgnc_major_serial_registered;
-	bool		dgnc_major_transparent_print_registered;
-
 	u16		dpatype;	/* The board "type",
 					 * as defined by DPA
 					 */

drivers/staging/dgnc/dgnc_tty.c

@@ -204,16 +204,12 @@ int dgnc_tty_register(struct dgnc_board *brd)
 	 */
 	tty_set_operations(brd->serial_driver, &dgnc_tty_ops);
 
-	if (!brd->dgnc_major_serial_registered) {
-		/* Register tty devices */
 	rc = tty_register_driver(brd->serial_driver);
 	if (rc < 0) {
 		dev_dbg(&brd->pdev->dev,
 			"Can't register tty device (%d)\n", rc);
 		goto free_serial_driver;
 	}
-		brd->dgnc_major_serial_registered = true;
-	}
 
 	/*
 	 * If we're doing transparent print, we have to do all of the above
@@ -247,8 +243,6 @@ int dgnc_tty_register(struct dgnc_board *brd)
 	 */
 	tty_set_operations(brd->print_driver, &dgnc_tty_ops);
 
-	if (!brd->dgnc_major_transparent_print_registered) {
-		/* Register Transparent Print devices */
 	rc = tty_register_driver(brd->print_driver);
 	if (rc < 0) {
 		dev_dbg(&brd->pdev->dev,
@@ -256,8 +250,6 @@ int dgnc_tty_register(struct dgnc_board *brd)
 			rc);
 		goto free_print_driver;
 	}
-		brd->dgnc_major_transparent_print_registered = true;
-	}
 
 	dgnc_BoardsByMajor[brd->serial_driver->major] = brd;
 
@@ -396,7 +388,6 @@ void dgnc_cleanup_tty(struct dgnc_board *brd)
 {
 	int i = 0;
 
-	if (brd->dgnc_major_serial_registered) {
 	dgnc_BoardsByMajor[brd->serial_driver->major] = NULL;
 	for (i = 0; i < brd->nasync; i++) {
 		if (brd->channels[i])
@@ -405,10 +396,7 @@ void dgnc_cleanup_tty(struct dgnc_board *brd)
 		tty_unregister_device(brd->serial_driver, i);
 	}
 	tty_unregister_driver(brd->serial_driver);
-		brd->dgnc_major_serial_registered = false;
-	}
 
-	if (brd->dgnc_major_transparent_print_registered) {
 	dgnc_BoardsByMajor[brd->print_driver->major] = NULL;
 	for (i = 0; i < brd->nasync; i++) {
 		if (brd->channels[i])
@@ -417,8 +405,6 @@ void dgnc_cleanup_tty(struct dgnc_board *brd)
 		tty_unregister_device(brd->print_driver, i);
 	}
 	tty_unregister_driver(brd->print_driver);
-		brd->dgnc_major_transparent_print_registered = false;
-	}
 
 	put_tty_driver(brd->serial_driver);
 	put_tty_driver(brd->print_driver);