From 4ef2ccc2611456667ea78c6f418ce87e1fa9fac5 Mon Sep 17 00:00:00 2001 From: Trent Piepho Date: Wed, 28 Jan 2009 21:32:58 -0300 Subject: [PATCH] V4L/DVB (10558): bttv: norm value should be unsigned The norm value in the driver is an index into an array and the the driver doesn't allow it to be negative or otherwise invalid. It should be unsigned but wasn't in all places. Fix some structs and functions to have the norm be unsigned. Get rid of useless checks for "< 0". Most of the driver code can't handle a norm value that's out of range, so change some ">= BTTV_TVNORMS" checks to BUG_ON(). There's no point in silently ignoring invalid driver state just to crash because of it later. Reported-by: Roel Kluin Signed-off-by: Trent Piepho Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/bt8xx/bttv-cards.c | 2 +- drivers/media/video/bt8xx/bttv-driver.c | 13 +++++-------- drivers/media/video/bt8xx/bttv-vbi.c | 2 +- drivers/media/video/bt8xx/bttv.h | 2 +- drivers/media/video/bt8xx/bttvp.h | 9 +++++---- 5 files changed, 13 insertions(+), 15 deletions(-) diff --git a/drivers/media/video/bt8xx/bttv-cards.c b/drivers/media/video/bt8xx/bttv-cards.c index 9dfd8c70e4fb..2df0ce2afe98 100644 --- a/drivers/media/video/bt8xx/bttv-cards.c +++ b/drivers/media/video/bt8xx/bttv-cards.c @@ -4085,7 +4085,7 @@ static void __devinit avermedia_eeprom(struct bttv *btv) } /* 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 c71f394fc0ea..4ec476a9c0e4 100644 --- a/drivers/media/video/bt8xx/bttv-driver.c +++ b/drivers/media/video/bt8xx/bttv-driver.c @@ -1277,7 +1277,7 @@ bttv_crop_calc_limits(struct bttv_crop *c) } 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 @@ set_tvnorm(struct bttv *btv, unsigned int norm) 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 6819e21a3773..e79a402fa6cd 100644 --- a/drivers/media/video/bt8xx/bttv-vbi.c +++ b/drivers/media/video/bt8xx/bttv-vbi.c @@ -411,7 +411,7 @@ int bttv_g_fmt_vbi_cap(struct file *file, void *f, struct v4l2_format *frt) 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 a7bcad171823..b1986b94d29f 100644 --- a/drivers/media/video/bt8xx/bttv.h +++ b/drivers/media/video/bt8xx/bttv.h @@ -265,7 +265,7 @@ extern void bttv_init_card2(struct bttv *btv); /* 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 199a4d225caf..230e148e78fe 100644 --- a/drivers/media/video/bt8xx/bttvp.h +++ b/drivers/media/video/bt8xx/bttvp.h @@ -135,7 +135,7 @@ struct bttv_buffer { /* 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_buffer_set { }; struct bttv_overlay { - int tvnorm; + unsigned int tvnorm; struct v4l2_rect w; enum v4l2_field field; struct v4l2_clip *clips; @@ -174,7 +174,7 @@ struct bttv_vbi_fmt { }; /* 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 @@ struct bttv { 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; -- 2.30.2