[media] lirc: wire up .compat_ioctl to main ioctl handler

As pointed out (and tested) by Joris van Rantwijk, we do actually need
to wire up .compat_ioctl for 32-bit lirc userspace to work with 64-bit
lirc kernelspace. Do it. And add a check to make sure we get a valid
irctl in the ioctl handler.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/lirc/lirc_it87.c

@@ -339,6 +339,9 @@ static const struct file_operations lirc_fops = {
 	.write		= lirc_write,
 	.poll		= lirc_poll,
 	.unlocked_ioctl	= lirc_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= lirc_ioctl,
+#endif
 	.open		= lirc_open,
 	.release	= lirc_close,
 };

drivers/staging/lirc/lirc_parallel.c

@@ -546,6 +546,9 @@ static const struct file_operations lirc_fops = {
 	.write		= lirc_write,
 	.poll		= lirc_poll,
 	.unlocked_ioctl	= lirc_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= lirc_ioctl,
+#endif
 	.open		= lirc_open,
 	.release	= lirc_close
 };

drivers/staging/lirc/lirc_serial.c

@@ -1053,6 +1053,9 @@ static const struct file_operations lirc_fops = {
 	.owner		= THIS_MODULE,
 	.write		= lirc_write,
 	.unlocked_ioctl	= lirc_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= lirc_ioctl,
+#endif
 	.read		= lirc_dev_fop_read,
 	.poll		= lirc_dev_fop_poll,
 	.open		= lirc_dev_fop_open,

drivers/staging/lirc/lirc_sir.c

@@ -456,6 +456,9 @@ static const struct file_operations lirc_fops = {
 	.write		= lirc_write,
 	.poll		= lirc_poll,
 	.unlocked_ioctl	= lirc_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= lirc_ioctl,
+#endif
 	.open		= lirc_dev_fop_open,
 	.release	= lirc_dev_fop_close,
 };

drivers/staging/lirc/lirc_zilog.c

@@ -1139,6 +1139,9 @@ static const struct file_operations lirc_fops = {
 	.write		= write,
 	.poll		= poll,
 	.unlocked_ioctl	= ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= ioctl,
+#endif
 	.open		= open,
 	.release	= close
 };