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

@@ -231,6 +231,9 @@ static struct file_operations lirc_fops = {
 	.owner		= THIS_MODULE,
 	.write		= ir_lirc_transmit_ir,
 	.unlocked_ioctl	= ir_lirc_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= ir_lirc_ioctl,
+#endif
 	.read		= lirc_dev_fop_read,
 	.poll		= lirc_dev_fop_poll,
 	.open		= lirc_dev_fop_open,

drivers/media/IR/lirc_dev.c

@@ -161,6 +161,9 @@ static struct file_operations fops = {
 	.write		= lirc_dev_fop_write,
 	.poll		= lirc_dev_fop_poll,
 	.unlocked_ioctl	= lirc_dev_fop_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= lirc_dev_fop_ioctl,
+#endif
 	.open		= lirc_dev_fop_open,
 	.release	= lirc_dev_fop_close,
 };
@@ -528,6 +531,11 @@ long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	int result = 0;
 	struct irctl *ir = file->private_data;
 
+	if (!ir) {
+		printk(KERN_ERR "lirc_dev: %s: no irctl found!\n", __func__);
+		return -ENODEV;
+	}
+
 	dev_dbg(ir->d.dev, LOGHEAD "ioctl called (0x%x)\n",
 		ir->d.name, ir->d.minor, cmd);
 

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
 };