diff --git a/drivers/media/video/bt8xx/bttv-cards.c b/drivers/media/video/bt8xx/bttv-cards.c
index 9dfd8c7..2df0ce2 100644
--- a/drivers/media/video/bt8xx/bttv-cards.c
+++ b/drivers/media/video/bt8xx/bttv-cards.c
@@ -4085,7 +4085,7 @@
 }
 
 /* used on Voodoo TV/FM (Voodoo 200), S0 wired to 0x10000 */
-void bttv_tda9880_setnorm(struct bttv *btv, int norm)
+void bttv_tda9880_setnorm(struct bttv *btv, unsigned int norm)
 {
 	/* fix up our card entry */
 	if(norm==V4L2_STD_NTSC) {
diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index c71f394..4ec476a 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -1277,7 +1277,7 @@
 }
 
 static void
-bttv_crop_reset(struct bttv_crop *c, int norm)
+bttv_crop_reset(struct bttv_crop *c, unsigned int norm)
 {
 	c->rect = bttv_tvnorms[norm].cropcap.defrect;
 	bttv_crop_calc_limits(c);
@@ -1290,16 +1290,13 @@
 	const struct bttv_tvnorm *tvnorm;
 	v4l2_std_id id;
 
-	if (norm < 0 || norm >= BTTV_TVNORMS)
-		return -EINVAL;
+	BUG_ON(norm >= BTTV_TVNORMS);
+	BUG_ON(btv->tvnorm >= BTTV_TVNORMS);
 
 	tvnorm = &bttv_tvnorms[norm];
 
-	if (btv->tvnorm < 0 ||
-	    btv->tvnorm >= BTTV_TVNORMS ||
-	    0 != memcmp(&bttv_tvnorms[btv->tvnorm].cropcap,
-			&tvnorm->cropcap,
-			sizeof (tvnorm->cropcap))) {
+	if (!memcmp(&bttv_tvnorms[btv->tvnorm].cropcap, &tvnorm->cropcap,
+		    sizeof (tvnorm->cropcap))) {
 		bttv_crop_reset(&btv->crop[0], norm);
 		btv->crop[1] = btv->crop[0]; /* current = default */
 
diff --git a/drivers/media/video/bt8xx/bttv-vbi.c b/drivers/media/video/bt8xx/bttv-vbi.c
index 6819e21..e79a402 100644
--- a/drivers/media/video/bt8xx/bttv-vbi.c
+++ b/drivers/media/video/bt8xx/bttv-vbi.c
@@ -411,7 +411,7 @@
 	return 0;
 }
 
-void bttv_vbi_fmt_reset(struct bttv_vbi_fmt *f, int norm)
+void bttv_vbi_fmt_reset(struct bttv_vbi_fmt *f, unsigned int norm)
 {
 	const struct bttv_tvnorm *tvnorm;
 	unsigned int real_samples_per_line;
diff --git a/drivers/media/video/bt8xx/bttv.h b/drivers/media/video/bt8xx/bttv.h
index a7bcad1..b1986b94 100644
--- a/drivers/media/video/bt8xx/bttv.h
+++ b/drivers/media/video/bt8xx/bttv.h
@@ -265,7 +265,7 @@
 
 /* card-specific funtions */
 extern void tea5757_set_freq(struct bttv *btv, unsigned short freq);
-extern void bttv_tda9880_setnorm(struct bttv *btv, int norm);
+extern void bttv_tda9880_setnorm(struct bttv *btv, unsigned int norm);
 
 /* extra tweaks for some chipsets */
 extern void bttv_check_chipset(void);
diff --git a/drivers/media/video/bt8xx/bttvp.h b/drivers/media/video/bt8xx/bttvp.h
index 199a4d2..230e148 100644
--- a/drivers/media/video/bt8xx/bttvp.h
+++ b/drivers/media/video/bt8xx/bttvp.h
@@ -135,7 +135,7 @@
 
 	/* bttv specific */
 	const struct bttv_format   *fmt;
-	int                        tvnorm;
+	unsigned int               tvnorm;
 	int                        btformat;
 	int                        btswap;
 	struct bttv_geometry       geo;
@@ -154,7 +154,7 @@
 };
 
 struct bttv_overlay {
-	int                    tvnorm;
+	unsigned int           tvnorm;
 	struct v4l2_rect       w;
 	enum v4l2_field        field;
 	struct v4l2_clip       *clips;
@@ -174,7 +174,7 @@
 };
 
 /* bttv-vbi.c */
-void bttv_vbi_fmt_reset(struct bttv_vbi_fmt *f, int norm);
+void bttv_vbi_fmt_reset(struct bttv_vbi_fmt *f, unsigned int norm);
 
 struct bttv_crop {
 	/* A cropping rectangle in struct bttv_tvnorm.cropcap units. */
@@ -378,7 +378,8 @@
 	unsigned int audio;
 	unsigned int mute;
 	unsigned long freq;
-	int tvnorm,hue,contrast,bright,saturation;
+	unsigned int tvnorm;
+	int hue, contrast, bright, saturation;
 	struct v4l2_framebuffer fbuf;
 	unsigned int field_count;