[media] IR/lirc: further ioctl portability fixups

>From Joris van Rantwijk <jorispubl@xs4all.nl>:

	I tested lirc_serial and found that it works fine.
	Except the LIRC ioctls do not work in my 64-bit-kernel/32-bit-user
	setup. I added compat_ioctl entries in the drivers to fix this.

	While doing so, I noticed inconsistencies in the argument type of
	the LIRC ioctls. All ioctls are declared in lirc.h as having argument
	type __u32, however there are a few places where the driver calls
	get_user/put_user with an unsigned long argument.

	The patch below changes lirc_dev and lirc_serial to use __u32 for all
	ioctl arguments, and adds compat_ioctl entries.
	It should probably also be done in the other low-level drivers,
	but I don't have hardware to test those.

I've dropped the .compat_ioctl addition from Joris' original patch,
as I swear the non-compat definition should now work for both 32-bit
and 64-bit userspace. Technically, I think we still need/want a
in getting a reply to you).

Reported-by: Joris van Rantwijk <jorispubl@xs4all.nl>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/IR/ir-lirc-codec.c

@@ -102,7 +102,7 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
 	struct ir_input_dev *ir_dev;
 	int ret = 0;
 	void *drv_data;
-	unsigned long val = 0;
+	__u32 val = 0;
 
 	lirc = lirc_get_pdata(filep);
 	if (!lirc)
@@ -115,7 +115,7 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
 	drv_data = ir_dev->props->priv;
 
 	if (_IOC_DIR(cmd) & _IOC_WRITE) {
-		ret = get_user(val, (unsigned long *)arg);
+		ret = get_user(val, (__u32 *)arg);
 		if (ret)
 			return ret;
 	}
@@ -135,14 +135,14 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
 	/* TX settings */
 	case LIRC_SET_TRANSMITTER_MASK:
 		if (ir_dev->props->s_tx_mask)
-			ret = ir_dev->props->s_tx_mask(drv_data, (u32)val);
+			ret = ir_dev->props->s_tx_mask(drv_data, val);
 		else
 			return -EINVAL;
 		break;
 
 	case LIRC_SET_SEND_CARRIER:
 		if (ir_dev->props->s_tx_carrier)
-			ir_dev->props->s_tx_carrier(drv_data, (u32)val);
+			ir_dev->props->s_tx_carrier(drv_data, val);
 		else
 			return -EINVAL;
 		break;
@@ -212,7 +212,7 @@ static long ir_lirc_ioctl(struct file *filep, unsigned int cmd,
 	}
 
 	if (_IOC_DIR(cmd) & _IOC_READ)
-		ret = put_user(val, (unsigned long *)arg);
+		ret = put_user(val, (__u32 *)arg);
 
 	return ret;
 }

drivers/media/IR/lirc_dev.c

@@ -524,7 +524,7 @@ EXPORT_SYMBOL(lirc_dev_fop_poll);
 
 long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	unsigned long mode;
+	__u32 mode;
 	int result = 0;
 	struct irctl *ir = file->private_data;
 
@@ -541,7 +541,7 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 	switch (cmd) {
 	case LIRC_GET_FEATURES:
-		result = put_user(ir->d.features, (unsigned long *)arg);
+		result = put_user(ir->d.features, (__u32 *)arg);
 		break;
 	case LIRC_GET_REC_MODE:
 		if (!(ir->d.features & LIRC_CAN_REC_MASK)) {
@@ -551,15 +551,15 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		result = put_user(LIRC_REC2MODE
 				  (ir->d.features & LIRC_CAN_REC_MASK),
-				  (unsigned long *)arg);
+				  (__u32 *)arg);
 		break;
 	case LIRC_SET_REC_MODE:
 		if (!(ir->d.features & LIRC_CAN_REC_MASK)) {
 			result = -ENOSYS;
 			break;
 		}
 
-		result = get_user(mode, (unsigned long *)arg);
+		result = get_user(mode, (__u32 *)arg);
 		if (!result && !(LIRC_MODE2REC(mode) & ir->d.features))
 			result = -EINVAL;
 		/*
@@ -568,7 +568,7 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		 */
 		break;
 	case LIRC_GET_LENGTH:
-		result = put_user(ir->d.code_length, (unsigned long *)arg);
+		result = put_user(ir->d.code_length, (__u32 *)arg);
 		break;
 	case LIRC_GET_MIN_TIMEOUT:
 		if (!(ir->d.features & LIRC_CAN_SET_REC_TIMEOUT) ||
@@ -577,7 +577,7 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			break;
 		}
 
-		result = put_user(ir->d.min_timeout, (unsigned long *)arg);
+		result = put_user(ir->d.min_timeout, (__u32 *)arg);
 		break;
 	case LIRC_GET_MAX_TIMEOUT:
 		if (!(ir->d.features & LIRC_CAN_SET_REC_TIMEOUT) ||
@@ -586,7 +586,7 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			break;
 		}
 
-		result = put_user(ir->d.max_timeout, (unsigned long *)arg);
+		result = put_user(ir->d.max_timeout, (__u32 *)arg);
 		break;
 	default:
 		result = -EINVAL;

include/media/lirc_dev.h

@@ -125,10 +125,10 @@ static inline unsigned int lirc_buffer_write(struct lirc_buffer *buf,
 struct lirc_driver {
 	char name[40];
 	int minor;
-	unsigned long code_length;
+	__u32 code_length;
 	unsigned int buffer_size; /* in chunks holding one code each */
 	int sample_rate;
-	unsigned long features;
+	__u32 features;
 
 	unsigned int chunk_size;