drivers/isdn: Remove unnecessary casts of private_data

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/isdn/capi/capi.c

@@ -691,7 +691,7 @@ static void capi_recv_message(struct capi20_appl *ap, struct sk_buff *skb)
 static ssize_t
 capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 {
-	struct capidev *cdev = (struct capidev *)file->private_data;
+	struct capidev *cdev = file->private_data;
 	struct sk_buff *skb;
 	size_t copied;
 	int err;
@@ -726,7 +726,7 @@ capi_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 static ssize_t
 capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 {
-	struct capidev *cdev = (struct capidev *)file->private_data;
+	struct capidev *cdev = file->private_data;
 	struct sk_buff *skb;
 	u16 mlen;
 
@@ -773,7 +773,7 @@ capi_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos
 static unsigned int
 capi_poll(struct file *file, poll_table * wait)
 {
-	struct capidev *cdev = (struct capidev *)file->private_data;
+	struct capidev *cdev = file->private_data;
 	unsigned int mask = 0;
 
 	if (!cdev->ap.applid)

drivers/isdn/hysdn/hysdn_proclog.c

@@ -158,7 +158,7 @@ hysdn_log_write(struct file *file, const char __user *buf, size_t count, loff_t
 	int found = 0;
 	unsigned char *cp, valbuf[128];
 	long base = 10;
-	hysdn_card *card = (hysdn_card *) file->private_data;
+	hysdn_card *card = file->private_data;
 
 	if (count > (sizeof(valbuf) - 1))
 		count = sizeof(valbuf) - 1;	/* limit length */

drivers/isdn/i4l/isdn_ppp.c

@@ -477,7 +477,7 @@ isdn_ppp_ioctl(int min, struct file *file, unsigned int cmd, unsigned long arg)
 	struct isdn_ppp_comp_data data;
 	void __user *argp = (void __user *)arg;
 
-	is = (struct ippp_struct *) file->private_data;
+	is = file->private_data;
 	lp = is->lp;
 
 	if (is->debug & 0x1)