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Commit be1f985f authored by Jarod Wilson's avatar Jarod Wilson Committed by Mauro Carvalho Chehab
Browse files

[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: default avatarJoris van Rantwijk <jorispubl@xs4all.nl>
Signed-off-by: default avatarJarod Wilson <jarod@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent d322bf4a

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

+5 −5
Original line number Diff line number Diff line
@@ -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

+7 −7
Original line number Diff line number Diff line
@@ -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)) {
@@ -551,7 +551,7 @@ 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)) {
@@ -559,7 +559,7 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
			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

+2 −2
Original line number Diff line number Diff line
@@ -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;