tty: Remove some pointless casts

disc_data and driver_data are void *

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/n_r3964.c b/drivers/char/n_r3964.c
index 4a8215a..d2e93e3 100644
--- a/drivers/char/n_r3964.c
+++ b/drivers/char/n_r3964.c
@@ -1003,7 +1003,7 @@
 
 static void r3964_close(struct tty_struct *tty)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_client_info *pClient, *pNext;
 	struct r3964_message *pMsg;
 	struct r3964_block_header *pHeader, *pNextHeader;
@@ -1058,7 +1058,7 @@
 static ssize_t r3964_read(struct tty_struct *tty, struct file *file,
 			  unsigned char __user * buf, size_t nr)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_client_info *pClient;
 	struct r3964_message *pMsg;
 	struct r3964_client_message theMsg;
@@ -1113,7 +1113,7 @@
 static ssize_t r3964_write(struct tty_struct *tty, struct file *file,
 			   const unsigned char *data, size_t count)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_block_header *pHeader;
 	struct r3964_client_info *pClient;
 	unsigned char *new_data;
@@ -1182,7 +1182,7 @@
 static int r3964_ioctl(struct tty_struct *tty, struct file *file,
 		unsigned int cmd, unsigned long arg)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	if (pInfo == NULL)
 		return -EINVAL;
 	switch (cmd) {
@@ -1216,7 +1216,7 @@
 static unsigned int r3964_poll(struct tty_struct *tty, struct file *file,
 			struct poll_table_struct *wait)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	struct r3964_client_info *pClient;
 	struct r3964_message *pMsg = NULL;
 	unsigned long flags;
@@ -1241,7 +1241,7 @@
 static void r3964_receive_buf(struct tty_struct *tty, const unsigned char *cp,
 			char *fp, int count)
 {
-	struct r3964_info *pInfo = (struct r3964_info *)tty->disc_data;
+	struct r3964_info *pInfo = tty->disc_data;
 	const unsigned char *p;
 	char *f, flags = 0;
 	int i;