diff --git a/drivers/media/radio/radio-aimslab.c b/drivers/media/radio/radio-aimslab.c
index ee204fdc4157..a99227f7a9da 100644
--- a/drivers/media/radio/radio-aimslab.c
+++ b/drivers/media/radio/radio-aimslab.c
@@ -398,7 +398,7 @@ static int __init rtrack_init(void)
 	rt->io = io;
 
 	if (rt->io == -1) {
-		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x???\n");
+		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x20f or 0x30f\n");
 		return -EINVAL;
 	}
 
diff --git a/drivers/media/radio/radio-aztech.c b/drivers/media/radio/radio-aztech.c
index 35f6f403f65d..186f3bae0ecc 100644
--- a/drivers/media/radio/radio-aztech.c
+++ b/drivers/media/radio/radio-aztech.c
@@ -361,7 +361,7 @@ static int __init aztech_init(void)
 	az->io = io;
 
 	if (az->io == -1) {
-		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x???\n");
+		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x350 or 0x358\n");
 		return -EINVAL;
 	}
 
diff --git a/drivers/media/radio/radio-cadet.c b/drivers/media/radio/radio-cadet.c
index 7741f33ce873..4627c5a662ee 100644
--- a/drivers/media/radio/radio-cadet.c
+++ b/drivers/media/radio/radio-cadet.c
@@ -659,7 +659,8 @@ static int __init cadet_init(void)
 	/* Else we bail out */
 	if (dev->io < 0) {
 #ifdef MODULE
-		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x???\n");
+		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x330, 0x332, 0x334,\n");
+		v4l2_err(v4l2_dev, "0x336, 0x338, 0x33a, 0x33c or 0x33e\n");
 #endif
 		goto fail;
 	}
diff --git a/drivers/media/radio/radio-terratec.c b/drivers/media/radio/radio-terratec.c
index 5a37e0d797bf..a6243f738a78 100644
--- a/drivers/media/radio/radio-terratec.c
+++ b/drivers/media/radio/radio-terratec.c
@@ -375,7 +375,7 @@ static int __init terratec_init(void)
 	strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
 	tt->io = io;
 	if (tt->io == -1) {
-		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x???\n");
+		v4l2_err(v4l2_dev, "you must set an I/O address with io=0x590 or 0x591\n");
 		return -EINVAL;
 	}
 	if (!request_region(tt->io, 2, "terratec")) {
diff --git a/drivers/media/radio/radio-trust.c b/drivers/media/radio/radio-trust.c
index fe964b45fdf5..4aa394940e12 100644
--- a/drivers/media/radio/radio-trust.c
+++ b/drivers/media/radio/radio-trust.c
@@ -383,7 +383,7 @@ static int __init trust_init(void)
 	mutex_init(&tr->lock);
 
 	if (tr->io == -1) {
-		v4l2_err(v4l2_dev, "You must set an I/O address with io=0x???\n");
+		v4l2_err(v4l2_dev, "You must set an I/O address with io=0x0x350 or 0x358\n");
 		return -EINVAL;
 	}
 	if (!request_region(tr->io, 2, "Trust FM Radio")) {
diff --git a/drivers/media/radio/radio-zoltrix.c b/drivers/media/radio/radio-zoltrix.c
index 18dbaf1650de..f0ea281ba51b 100644
--- a/drivers/media/radio/radio-zoltrix.c
+++ b/drivers/media/radio/radio-zoltrix.c
@@ -413,7 +413,7 @@ static int __init zoltrix_init(void)
 	strlcpy(v4l2_dev->name, "zoltrix", sizeof(v4l2_dev->name));
 	zol->io = io;
 	if (zol->io == -1) {
-		v4l2_err(v4l2_dev, "You must set an I/O address with io=0x???\n");
+		v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or 0x30c\n");
 		return -EINVAL;
 	}
 	if (zol->io != 0x20c && zol->io != 0x30c) {