staging: dgap: uses kzalloc for allocating memory

Originally, this driver created it's own allocating
function. This patch removes that function and calls
kzalloc directly.

This patch affects:
 - driver.c
 - driver.h
 - fep5.c
 - tty.c
Signed-off-by: Lidza Louina <lidza.louina@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgap/dgap_driver.c

@@ -506,7 +506,7 @@ static int dgap_found_board(struct pci_dev *pdev, int id)
 
 	/* get the board structure and prep it */
 	brd = dgap_Board[dgap_NumBoards] =
-	(struct board_t *) dgap_driver_kzmalloc(sizeof(struct board_t), GFP_KERNEL);
+	(struct board_t *) kzalloc(sizeof(struct board_t), GFP_KERNEL);
 	if (!brd) {
 		APR(("memory allocation for board structure failed\n"));
 		return(-ENOMEM);
@@ -514,7 +514,7 @@ static int dgap_found_board(struct pci_dev *pdev, int id)
 
 	/* make a temporary message buffer for the boot messages */
 	brd->msgbuf = brd->msgbuf_head =
-		(char *) dgap_driver_kzmalloc(sizeof(char) * 8192, GFP_KERNEL);
+		(char *) kzalloc(sizeof(char) * 8192, GFP_KERNEL);
 	if(!brd->msgbuf) {
 		kfree(brd);
 		APR(("memory allocation for board msgbuf failed\n"));
@@ -924,20 +924,6 @@ static void dgap_init_globals(void)
  ************************************************************************/
 
 
-/*
- * dgap_driver_kzmalloc()
- *
- * Malloc and clear memory,
- */
-void *dgap_driver_kzmalloc(size_t size, int priority)
-{
- 	void *p = kmalloc(size, priority);
-	if(p)
-		memset(p, 0, size);
-	return(p);
-}
-
-
 /*
  * dgap_mbuf()
  *

drivers/staging/dgap/dgap_driver.h

@@ -578,7 +578,6 @@ struct channel_t {
  *************************************************************************/
 
 extern int		dgap_ms_sleep(ulong ms);
-extern void		*dgap_driver_kzmalloc(size_t size, int priority);
 extern char		*dgap_ioctl_name(int cmd);
 extern void		dgap_do_bios_load(struct board_t *brd, uchar __user *ubios, int len);
 extern void		dgap_do_fep_load(struct board_t *brd, uchar __user *ufep, int len);

drivers/staging/dgap/dgap_fep5.c

@@ -75,7 +75,7 @@ void dgap_do_config_load(uchar __user *uaddr, int len)
 	char buf[U2BSIZE];
 	int n;
 
-	to_addr = dgap_config_buf = dgap_driver_kzmalloc(len + 1, GFP_ATOMIC);
+	to_addr = dgap_config_buf = kzalloc(len + 1, GFP_ATOMIC);
 	if (!dgap_config_buf) {
 		DPR_INIT(("dgap_do_config_load - unable to allocate memory for file\n"));
 		dgap_driver_state = DRIVER_NEED_CONFIG_LOAD;
@@ -130,8 +130,8 @@ int dgap_after_config_loaded(void)
 		/*
 		 * allocate flip buffer for board.
 		 */
-		dgap_Board[i]->flipbuf = dgap_driver_kzmalloc(MYFLIPLEN, GFP_ATOMIC);
-		dgap_Board[i]->flipflagbuf = dgap_driver_kzmalloc(MYFLIPLEN, GFP_ATOMIC);
+		dgap_Board[i]->flipbuf = kzalloc(MYFLIPLEN, GFP_ATOMIC);
+		dgap_Board[i]->flipflagbuf = kzalloc(MYFLIPLEN, GFP_ATOMIC);
 	}
 
 	return rc;

drivers/staging/dgap/dgap_tty.c

@@ -233,7 +233,7 @@ int dgap_tty_register(struct board_t *brd)
 	brd->SerialDriver->flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK);
 
 	/* The kernel wants space to store pointers to tty_structs */
-	brd->SerialDriver->ttys = dgap_driver_kzmalloc(MAXPORTS * sizeof(struct tty_struct *), GFP_KERNEL);
+	brd->SerialDriver->ttys = kzalloc(MAXPORTS * sizeof(struct tty_struct *), GFP_KERNEL);
 	if (!brd->SerialDriver->ttys)
 		return(-ENOMEM);
 
@@ -266,7 +266,7 @@ int dgap_tty_register(struct board_t *brd)
 	brd->PrintDriver->flags = (TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_HARDWARE_BREAK);
 
 	/* The kernel wants space to store pointers to tty_structs */
-	brd->PrintDriver->ttys = dgap_driver_kzmalloc(MAXPORTS * sizeof(struct tty_struct *), GFP_KERNEL);
+	brd->PrintDriver->ttys = kzalloc(MAXPORTS * sizeof(struct tty_struct *), GFP_KERNEL);
 	if (!brd->PrintDriver->ttys)
 		return(-ENOMEM);
 
@@ -380,7 +380,7 @@ int dgap_tty_init(struct board_t *brd)
 	 */
 	for (i = 0; i < brd->nasync; i++) {
 		if (!brd->channels[i]) {
-			brd->channels[i] = dgap_driver_kzmalloc(sizeof(struct channel_t), GFP_ATOMIC);
+			brd->channels[i] = kzalloc(sizeof(struct channel_t), GFP_ATOMIC);
 			if (!brd->channels[i]) {
 				DPR_CORE(("%s:%d Unable to allocate memory for channel struct\n",
 				    __FILE__, __LINE__));