V4L/DVB (8757): v4l-dvb: fix a bunch of sparse warnings

Fixed a lot of sparse warnings: mostly warnings about shadowed variables
and signed/unsigned mismatches.

Signed-off-by: Hans Verkuil <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/common/saa7146_video.c

···
 	{
 		v4l2_std_id *id = arg;
 		int found = 0;
-		int i, err;
+		int i;
 
 		DEB_EE(("VIDIOC_S_STD\n"));
 
···
 	case VIDIOC_OVERLAY:
 	{
 		int on = *(int *)arg;
-		int err = 0;
 
 		DEB_D(("VIDIOC_OVERLAY on:%d\n",on));
 		if (on != 0) {
···
 	case VIDIOCGMBUF:
 	{
 		struct video_mbuf *mbuf = arg;
-		struct videobuf_queue *q;
 		int i;
 
 		/* fixme: number of capture buffers and sizes for v4l apps */

drivers/media/common/tuners/tuner-simple.c

···
 
 static int simple_config_lookup(struct dvb_frontend *fe,
 				struct tuner_params *t_params,
-				int *frequency, u8 *config, u8 *cb)
+				unsigned *frequency, u8 *config, u8 *cb)
 {
 	struct tuner_simple_priv *priv = fe->tuner_priv;
 	int i;
···
 	priv->last_div = div;
 	if (t_params->has_tda9887) {
 		struct v4l2_priv_tun_config tda9887_cfg;
-		int config = 0;
+		int tda_config = 0;
 		int is_secam_l = (params->std & (V4L2_STD_SECAM_L |
 						 V4L2_STD_SECAM_LC)) &&
 			!(params->std & ~(V4L2_STD_SECAM_L |
 					  V4L2_STD_SECAM_LC));
 
 		tda9887_cfg.tuner = TUNER_TDA9887;
-		tda9887_cfg.priv  = &config;
+		tda9887_cfg.priv  = &tda_config;
 
 		if (params->std == V4L2_STD_SECAM_LC) {
 			if (t_params->port1_active ^ t_params->port1_invert_for_secam_lc)
-				config |= TDA9887_PORT1_ACTIVE;
+				tda_config |= TDA9887_PORT1_ACTIVE;
 			if (t_params->port2_active ^ t_params->port2_invert_for_secam_lc)
-				config |= TDA9887_PORT2_ACTIVE;
+				tda_config |= TDA9887_PORT2_ACTIVE;
 		} else {
 			if (t_params->port1_active)
-				config |= TDA9887_PORT1_ACTIVE;
+				tda_config |= TDA9887_PORT1_ACTIVE;
 			if (t_params->port2_active)
-				config |= TDA9887_PORT2_ACTIVE;
+				tda_config |= TDA9887_PORT2_ACTIVE;
 		}
 		if (t_params->intercarrier_mode)
-			config |= TDA9887_INTERCARRIER;
+			tda_config |= TDA9887_INTERCARRIER;
 		if (is_secam_l) {
 			if (i == 0 && t_params->default_top_secam_low)
-				config |= TDA9887_TOP(t_params->default_top_secam_low);
+				tda_config |= TDA9887_TOP(t_params->default_top_secam_low);
 			else if (i == 1 && t_params->default_top_secam_mid)
-				config |= TDA9887_TOP(t_params->default_top_secam_mid);
+				tda_config |= TDA9887_TOP(t_params->default_top_secam_mid);
 			else if (t_params->default_top_secam_high)
-				config |= TDA9887_TOP(t_params->default_top_secam_high);
+				tda_config |= TDA9887_TOP(t_params->default_top_secam_high);
 		} else {
 			if (i == 0 && t_params->default_top_low)
-				config |= TDA9887_TOP(t_params->default_top_low);
+				tda_config |= TDA9887_TOP(t_params->default_top_low);
 			else if (i == 1 && t_params->default_top_mid)
-				config |= TDA9887_TOP(t_params->default_top_mid);
+				tda_config |= TDA9887_TOP(t_params->default_top_mid);
 			else if (t_params->default_top_high)
-				config |= TDA9887_TOP(t_params->default_top_high);
+				tda_config |= TDA9887_TOP(t_params->default_top_high);
 		}
 		if (t_params->default_pll_gating_18)
-			config |= TDA9887_GATING_18;
+			tda_config |= TDA9887_GATING_18;
 		i2c_clients_command(priv->i2c_props.adap, TUNER_SET_CONFIG,
 				    &tda9887_cfg);
 	}
···
 	static struct tuner_params *t_params;
 	u8 config, cb;
 	u32 div;
-	int ret, frequency = params->frequency / 62500;
+	int ret;
+	unsigned frequency = params->frequency / 62500;
 
 	t_params = simple_tuner_params(fe, TUNER_PARAM_TYPE_DIGITAL);
 	ret = simple_config_lookup(fe, t_params, &frequency, &config, &cb);

drivers/media/dvb/dvb-core/dmxdev.c

···
 		struct timespec timeout = { 0 };
 		struct dmx_pes_filter_params *para = &filter->params.pes;
 		dmx_output_t otype;
-		int ret;
 		int ts_type;
 		enum dmx_ts_pes ts_pes;
 		struct dmx_ts_feed **tsfeed = &filter->feed.ts;

drivers/media/dvb/dvb-core/dvb_ca_en50221.c

···
 					/* we need this extra check for annoying interfaces like the budget-av */
 					if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) &&
 					    (ca->pub->poll_slot_status)) {
-						int status = ca->pub->poll_slot_status(ca->pub, slot, 0);
+						status = ca->pub->poll_slot_status(ca->pub, slot, 0);
 						if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) {
 							ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE;
 							dvb_ca_en50221_thread_update_delay(ca);
···
 					/* we need this extra check for annoying interfaces like the budget-av */
 					if ((!(ca->flags & DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE)) &&
 					    (ca->pub->poll_slot_status)) {
-						int status = ca->pub->poll_slot_status(ca->pub, slot, 0);
+						status = ca->pub->poll_slot_status(ca->pub, slot, 0);
 						if (!(status & DVB_CA_EN50221_POLL_CAM_PRESENT)) {
 							ca->slot_info[slot].slot_state = DVB_CA_SLOTSTATE_NONE;
 							dvb_ca_en50221_thread_update_delay(ca);

drivers/media/dvb/dvb-core/dvb_frontend.c

···
 			 * initialization, so parg is 8 bits and does not
 			 * include the initialization or start bit
 			 */
-			unsigned long cmd = ((unsigned long) parg) << 1;
+			unsigned long swcmd = ((unsigned long) parg) << 1;
 			struct timeval nexttime;
 			struct timeval tv[10];
 			int i;
 			u8 last = 1;
 			if (dvb_frontend_debug)
-				printk("%s switch command: 0x%04lx\n", __func__, cmd);
+				printk("%s switch command: 0x%04lx\n", __func__, swcmd);
 			do_gettimeofday(&nexttime);
 			if (dvb_frontend_debug)
 				memcpy(&tv[0], &nexttime, sizeof(struct timeval));
···
 			for (i = 0; i < 9; i++) {
 				if (dvb_frontend_debug)
 					do_gettimeofday(&tv[i + 1]);
-				if ((cmd & 0x01) != last) {
+				if ((swcmd & 0x01) != last) {
 					/* set voltage to (last ? 13V : 18V) */
 					fe->ops.set_voltage(fe, (last) ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
 					last = (last) ? 0 : 1;
 				}
-				cmd = cmd >> 1;
+				swcmd = swcmd >> 1;
 				if (i != 8)
 					dvb_frontend_sleep_until(&nexttime, 8000);
 			}

drivers/media/dvb/dvb-usb/cxusb.c

···
 	if (d->state == DVB_USB_STATE_INIT &&
 	    usb_set_interface(d->udev, 0, 0) < 0)
 		err("set interface failed");
-	do; while (!(ret = cxusb_ctrl_msg(d, CMD_POWER_ON, NULL, 0, NULL, 0)) &&
+	do {} while (!(ret = cxusb_ctrl_msg(d, CMD_POWER_ON, NULL, 0, NULL, 0)) &&
 		   !(ret = cxusb_ctrl_msg(d, 0x15, NULL, 0, NULL, 0)) &&
 		   !(ret = cxusb_ctrl_msg(d, 0x17, NULL, 0, NULL, 0)) && 0);
 	if (!ret) {

drivers/media/radio/radio-maxiradio.c

···
 {
 	unsigned long int si;
 	int bl;
-	int data = FREQ2BITS(freq);
+	int val = FREQ2BITS(freq);
 
 	/* TEA5757 shift register bits (see pdf) */
 
-	outbit(0,io); // 24  search
-	outbit(1,io); // 23  search up/down
+	outbit(0, io); /* 24  search */
+	outbit(1, io); /* 23  search up/down */
 
-	outbit(0,io); // 22  stereo/mono
+	outbit(0, io); /* 22  stereo/mono */
 
-	outbit(0,io); // 21  band
-	outbit(0,io); // 20  band (only 00=FM works I think)
+	outbit(0, io); /* 21  band */
+	outbit(0, io); /* 20  band (only 00=FM works I think) */
 
-	outbit(0,io); // 19  port ?
-	outbit(0,io); // 18  port ?
+	outbit(0, io); /* 19  port ? */
+	outbit(0, io); /* 18  port ? */
 
-	outbit(0,io); // 17  search level
-	outbit(0,io); // 16  search level
+	outbit(0, io); /* 17  search level */
+	outbit(0, io); /* 16  search level */
 
 	si = 0x8000;
-	for (bl = 1; bl <= 16 ; bl++) {
-		outbit(data & si,io);
-		si >>=1;
+	for (bl = 1; bl <= 16; bl++) {
+		outbit(val & si, io);
+		si >>= 1;
 	}
 
 	dprintk(1, "Radio freq set to %d.%02d MHz\n",

drivers/media/video/bt8xx/bttv-cards.c

···
 
 static void flyvideo_gpio(struct bttv *btv)
 {
-	int gpio,has_remote,has_radio,is_capture_only,is_lr90,has_tda9820_tda9821;
-	int tuner=UNSET,ttype;
+	int gpio, has_remote, has_radio, is_capture_only;
+	int is_lr90, has_tda9820_tda9821;
+	int tuner_type = UNSET, ttype;
 
 	gpio_inout(0xffffff, 0);
 	udelay(8);  /* without this we would see the 0x1800 mask */
···
 	 * xxxF00(LR26/LR50), xxxFE0(LR90): Remote control chip (LVA001 or CF45) soldered
 	 * Note: Some bits are Audio_Mask !
 	 */
-	ttype=(gpio&0x0f0000)>>16;
-	switch(ttype) {
-	case 0x0: tuner=2; /* NTSC, e.g. TPI8NSR11P */
+	ttype = (gpio & 0x0f0000) >> 16;
+	switch (ttype) {
+	case 0x0:
+		tuner_type = 2;  /* NTSC, e.g. TPI8NSR11P */
 		break;
-	case 0x2: tuner=39;/* LG NTSC (newer TAPC series) TAPC-H701P */
+	case 0x2:
+		tuner_type = 39; /* LG NTSC (newer TAPC series) TAPC-H701P */
 		break;
-	case 0x4: tuner=5; /* Philips PAL TPI8PSB02P, TPI8PSB12P, TPI8PSB12D or FI1216, FM1216 */
+	case 0x4:
+		tuner_type = 5;  /* Philips PAL TPI8PSB02P, TPI8PSB12P, TPI8PSB12D or FI1216, FM1216 */
 		break;
-	case 0x6: tuner=37;/* LG PAL (newer TAPC series) TAPC-G702P */
+	case 0x6:
+		tuner_type = 37; /* LG PAL (newer TAPC series) TAPC-G702P */
 		break;
-		case 0xC: tuner=3; /* Philips SECAM(+PAL) FQ1216ME or FI1216MF */
+	case 0xC:
+		tuner_type = 3;  /* Philips SECAM(+PAL) FQ1216ME or FI1216MF */
 		break;
 	default:
 		printk(KERN_INFO "bttv%d: FlyVideo_gpio: unknown tuner type.\n", btv->c.nr);
+		break;
 	}
 
 	has_remote          =   gpio & 0x800000;
···
 	/*
 	 * gpio & 0x001000    output bit for audio routing */
 
-	if(is_capture_only)
-		tuner = TUNER_ABSENT; /* No tuner present */
+	if (is_capture_only)
+		tuner_type = TUNER_ABSENT; /* No tuner present */
 
 	printk(KERN_INFO "bttv%d: FlyVideo Radio=%s RemoteControl=%s Tuner=%d gpio=0x%06x\n",
-	       btv->c.nr, has_radio? "yes":"no ", has_remote? "yes":"no ", tuner, gpio);
+		btv->c.nr, has_radio ? "yes" : "no ",
+		has_remote ? "yes" : "no ", tuner_type, gpio);
 	printk(KERN_INFO "bttv%d: FlyVideo  LR90=%s tda9821/tda9820=%s capture_only=%s\n",
-		btv->c.nr, is_lr90?"yes":"no ", has_tda9820_tda9821?"yes":"no ",
-		is_capture_only?"yes":"no ");
+		btv->c.nr, is_lr90 ? "yes" : "no ",
+		has_tda9820_tda9821 ? "yes" : "no ",
+		is_capture_only ? "yes" : "no ");
 
-	if (tuner != UNSET) /* only set if known tuner autodetected, else let insmod option through */
-		btv->tuner_type = tuner;
+	if (tuner_type != UNSET) /* only set if known tuner autodetected, else let insmod option through */
+		btv->tuner_type = tuner_type;
 	btv->has_radio = has_radio;
 
 	/* LR90 Audio Routing is done by 2 hef4052, so Audio_Mask has 4 bits: 0x001c80
 	 * LR26/LR50 only has 1 hef4052, Audio_Mask 0x000c00
 	 * Audio options: from tuner, from tda9821/tda9821(mono,stereo,sap), from tda9874, ext., mute */
-	if(has_tda9820_tda9821) btv->audio_mode_gpio = lt9415_audio;
+	if (has_tda9820_tda9821)
+		btv->audio_mode_gpio = lt9415_audio;
 	/* todo: if(has_tda9874) btv->audio_mode_gpio = fv2000s_audio; */
 }
 
···
 
 static void __devinit avermedia_eeprom(struct bttv *btv)
 {
-	int tuner_make,tuner_tv_fm,tuner_format,tuner=0;
+	int tuner_make, tuner_tv_fm, tuner_format, tuner_type = 0;
 
 	tuner_make      = (eeprom_data[0x41] & 0x7);
 	tuner_tv_fm     = (eeprom_data[0x41] & 0x18) >> 3;
···
 	btv->has_remote = (eeprom_data[0x42] & 0x01);
 
 	if (tuner_make == 0 || tuner_make == 2)
-		if(tuner_format <=0x0a)
-			tuner = tuner_0_table[tuner_format];
+		if (tuner_format <= 0x0a)
+			tuner_type = tuner_0_table[tuner_format];
 	if (tuner_make == 1)
-		if(tuner_format <=9)
-			tuner = tuner_1_table[tuner_format];
+		if (tuner_format <= 9)
+			tuner_type = tuner_1_table[tuner_format];
 
 	if (tuner_make == 4)
-		if(tuner_format == 0x09)
-			tuner = TUNER_LG_NTSC_NEW_TAPC; /* TAPC-G702P */
+		if (tuner_format == 0x09)
+			tuner_type = TUNER_LG_NTSC_NEW_TAPC; /* TAPC-G702P */
 
 	printk(KERN_INFO "bttv%d: Avermedia eeprom[0x%02x%02x]: tuner=",
-		btv->c.nr,eeprom_data[0x41],eeprom_data[0x42]);
-	if(tuner) {
-		btv->tuner_type=tuner;
-		printk("%d",tuner);
+		btv->c.nr, eeprom_data[0x41], eeprom_data[0x42]);
+	if (tuner_type) {
+		btv->tuner_type = tuner_type;
+		printk(KERN_CONT "%d", tuner_type);
 	} else
-		printk("Unknown type");
-	printk(" radio:%s remote control:%s\n",
+		printk(KERN_CONT "Unknown type");
+	printk(KERN_CONT " radio:%s remote control:%s\n",
 	       tuner_tv_fm     ? "yes" : "no",
 	       btv->has_remote ? "yes" : "no");
 }

drivers/media/video/bt8xx/bttv-driver.c

···
 static unsigned int uv_ratio    = 50;
 static unsigned int full_luma_range;
 static unsigned int coring;
-extern int no_overlay;
 
 /* API features (turn on/off stuff for testing) */
 static unsigned int v4l2        = 1;

drivers/media/video/bt8xx/bttv-risc.c

···
 		  const struct bttv_format *fmt, struct bttv_overlay *ov,
 		  int skip_even, int skip_odd)
 {
-	int dwords,rc,line,maxy,start,end,skip,nskips;
+	int dwords, rc, line, maxy, start, end;
+	unsigned skip, nskips;
 	struct btcx_skiplist *skips;
 	__le32 *rp;
 	u32 ri,ra;

drivers/media/video/bt8xx/bttvp.h

···
 int bttv_sub_del_devices(struct bttv_core *core);
 
 /* ---------------------------------------------------------- */
+/* bttv-cards.c                                               */
+
+extern int no_overlay;
+
+/* ---------------------------------------------------------- */
 /* bttv-driver.c                                              */
 
 /* insmod options */

drivers/media/video/btcx-risc.c

···
 }
 
 void
-btcx_calc_skips(int line, int width, unsigned int *maxy,
+btcx_calc_skips(int line, int width, int *maxy,
 		struct btcx_skiplist *skips, unsigned int *nskips,
 		const struct v4l2_clip *clips, unsigned int nclips)
 {
 	unsigned int clip,skip;
-	int end,maxline;
+	int end, maxline;
 
 	skip=0;
 	maxline = 9999;

drivers/media/video/btcx-risc.h

···
 int btcx_align(struct v4l2_rect *win, struct v4l2_clip *clips,
 	       unsigned int n, int mask);
 void btcx_sort_clips(struct v4l2_clip *clips, unsigned int nclips);
-void btcx_calc_skips(int line, int width, unsigned int *maxy,
+void btcx_calc_skips(int line, int width, int *maxy,
 		     struct btcx_skiplist *skips, unsigned int *nskips,
 		     const struct v4l2_clip *clips, unsigned int nclips);
 

drivers/media/video/cpia2/cpia2_v4l.c

···
 		if(cam->params.pnp_id.device_type == DEVICE_STV_672 &&
 		   cam->params.version.sensor_flags==CPIA2_VP_SENSOR_FLAGS_500){
 			// Maximum 15fps
-			int i;
 			for(i=0; i<c->maximum; ++i) {
 				if(framerate_controls[i].value ==
 				   CPIA2_VP_FRAMERATE_15) {

drivers/media/video/cx18/cx18-av-firmware.c

···
 	u32 v;
 	const u8 *ptr;
 	int i;
-	int retries = 0;
+	int retries1 = 0;
 
 	if (request_firmware(&fw, FWFILE, &cx->dev->dev) != 0) {
 		CX18_ERR("unable to open firmware %s\n", FWFILE);
···
 
 	/* The firmware load often has byte errors, so allow for several
 	   retries, both at byte level and at the firmware load level. */
-	while (retries < 5) {
+	while (retries1 < 5) {
 		cx18_av_write4(cx, CXADEC_CHIP_CTRL, 0x00010000);
 		cx18_av_write(cx, CXADEC_STD_DET_CTL, 0xf6);
 
···
 		for (i = 0; i < size; i++) {
 			u32 dl_control = 0x0F000000 | i | ((u32)ptr[i] << 16);
 			u32 value = 0;
-			int retries;
+			int retries2;
 
-			for (retries = 0; retries < 5; retries++) {
+			for (retries2 = 0; retries2 < 5; retries2++) {
 				cx18_av_write4(cx, CXADEC_DL_CTL, dl_control);
 				udelay(10);
 				value = cx18_av_read4(cx, CXADEC_DL_CTL);
···
 				   the address.  We can only write the lower
 				   address byte of the address. */
 				if ((value & 0x3F00) != (dl_control & 0x3F00)) {
-					retries = 5;
+					retries2 = 5;
 					break;
 				}
 			}
-			if (retries >= 5)
+			if (retries2 >= 5)
 				break;
 		}
 		if (i == size)
 			break;
-		retries++;
+		retries1++;
 	}
-	if (retries >= 5) {
+	if (retries1 >= 5) {
 		CX18_ERR("unable to load firmware %s\n", FWFILE);
 		release_firmware(fw);
 		return -EIO;

drivers/media/video/cx18/cx18-driver.c

···
 				     -1, -1, -1, -1, -1, -1, -1, -1,
 				     -1, -1, -1, -1, -1, -1, -1, -1 };
 
-static int cardtype_c = 1;
-static int tuner_c = 1;
-static int radio_c = 1;
+static unsigned cardtype_c = 1;
+static unsigned tuner_c = 1;
+static unsigned radio_c = 1;
 static char pal[] = "--";
 static char secam[] = "--";
 static char ntsc[] = "-";

drivers/media/video/cx18/cx18-queue.c

···
 		s->name, s->buffers, s->buf_size,
 		s->buffers * s->buf_size / 1024);
 
-	if (((char *)&cx->scb->cpu_mdl[cx->mdl_offset + s->buffers] -
-				(char *)cx->scb) > SCB_RESERVED_SIZE) {
-		unsigned bufsz = (((char *)cx->scb) + SCB_RESERVED_SIZE -
-					((char *)cx->scb->cpu_mdl));
+	if (((char __iomem *)&cx->scb->cpu_mdl[cx->mdl_offset + s->buffers] -
+				(char __iomem *)cx->scb) > SCB_RESERVED_SIZE) {
+		unsigned bufsz = (((char __iomem *)cx->scb) + SCB_RESERVED_SIZE -
+					((char __iomem *)cx->scb->cpu_mdl));
 
 		CX18_ERR("Too many buffers, cannot fit in SCB area\n");
 		CX18_ERR("Max buffers = %zd\n",

drivers/media/video/gspca/gspca.c

···
 	i = ret;				/* frame index */
 	frame = &gspca_dev->frame[i];
 	if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
-		if (copy_to_user((__u8 *) frame->v4l2_buf.m.userptr,
+		if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
 				 frame->data,
 				 frame->v4l2_buf.bytesused)) {
 			PDEBUG(D_ERR|D_STREAM,

drivers/media/video/ks0127.c

···
 
 	case DECODER_ENABLE_OUTPUT:
 	{
+		int enable;
 
-		int *iarg = arg;
-		int enable = (*iarg != 0);
-			if (enable) {
-				dprintk("ks0127: command "
+		iarg = arg;
+		enable = (*iarg != 0);
+		if (enable) {
+			dprintk("ks0127: command "
 					"DECODER_ENABLE_OUTPUT on "
 					"(%d)\n", enable);
-				/* All output pins on */
-				ks0127_and_or(ks, KS_OFMTA, 0xcf, 0x30);
-				/* Obey the OEN pin */
-				ks0127_and_or(ks, KS_CDEM, 0x7f, 0x00);
-			} else {
-				dprintk("ks0127: command "
+			/* All output pins on */
+			ks0127_and_or(ks, KS_OFMTA, 0xcf, 0x30);
+			/* Obey the OEN pin */
+			ks0127_and_or(ks, KS_CDEM, 0x7f, 0x00);
+		} else {
+			dprintk("ks0127: command "
 					"DECODER_ENABLE_OUTPUT off "
 					"(%d)\n", enable);
-				/* Video output pins off */
-				ks0127_and_or(ks, KS_OFMTA, 0xcf, 0x00);
-				/* Ignore the OEN pin */
-				ks0127_and_or(ks, KS_CDEM, 0x7f, 0x80);
-			}
+			/* Video output pins off */
+			ks0127_and_or(ks, KS_OFMTA, 0xcf, 0x00);
+			/* Ignore the OEN pin */
+			ks0127_and_or(ks, KS_CDEM, 0x7f, 0x80);
+		}
 	}
 		break;
 

drivers/media/video/mxb.c

···
 	return 0;
 }
 
-static int std_callback(struct saa7146_dev* dev, struct saa7146_standard *std)
+static int std_callback(struct saa7146_dev *dev, struct saa7146_standard *standard)
 {
-	struct mxb* mxb = (struct mxb*)dev->ext_priv;
+	struct mxb *mxb = (struct mxb *)dev->ext_priv;
 	int zero = 0;
 	int one = 1;
 
-	if(V4L2_STD_PAL_I == std->id ) {
+	if (V4L2_STD_PAL_I == standard->id) {
 		v4l2_std_id std = V4L2_STD_PAL_I;
+
 		DEB_D(("VIDIOC_S_STD: setting mxb for PAL_I.\n"));
 		/* set the 7146 gpio register -- I don't know what this does exactly */
 		saa7146_write(dev, GPIO_CTRL, 0x00404050);
 		/* unset the 7111 gpio register -- I don't know what this does exactly */
-		mxb->saa7111a->driver->command(mxb->saa7111a,DECODER_SET_GPIO, &zero);
+		mxb->saa7111a->driver->command(mxb->saa7111a, DECODER_SET_GPIO, &zero);
 		mxb->tuner->driver->command(mxb->tuner, VIDIOC_S_STD, &std);
 	} else {
 		v4l2_std_id std = V4L2_STD_PAL_BG;
+
 		DEB_D(("VIDIOC_S_STD: setting mxb for PAL/NTSC/SECAM.\n"));
 		/* set the 7146 gpio register -- I don't know what this does exactly */
 		saa7146_write(dev, GPIO_CTRL, 0x00404050);
 		/* set the 7111 gpio register -- I don't know what this does exactly */
-		mxb->saa7111a->driver->command(mxb->saa7111a,DECODER_SET_GPIO, &one);
+		mxb->saa7111a->driver->command(mxb->saa7111a, DECODER_SET_GPIO, &one);
 		mxb->tuner->driver->command(mxb->tuner, VIDIOC_S_STD, &std);
 	}
 	return 0;

drivers/media/video/ov511.c

···
 			break;
 
 		/* Retry until idle */
-		do
+		do {
 			rc = reg_r(ov, R511_I2C_CTL);
-		while (rc > 0 && ((rc&1) == 0));
+		} while (rc > 0 && ((rc&1) == 0));
 		if (rc < 0)
 			break;
 
···
 			return rc;
 
 		/* Retry until idle */
-		do
-			 rc = reg_r(ov, R511_I2C_CTL);
-		while (rc > 0 && ((rc&1) == 0));
+		do {
+			rc = reg_r(ov, R511_I2C_CTL);
+		} while (rc > 0 && ((rc & 1) == 0));
 		if (rc < 0)
 			return rc;
 
···
 			return rc;
 
 		/* Retry until idle */
-		do
+		do {
 			rc = reg_r(ov, R511_I2C_CTL);
-		while (rc > 0 && ((rc&1) == 0));
+		} while (rc > 0 && ((rc&1) == 0));
 		if (rc < 0)
 			return rc;
 

drivers/media/video/pwc/pwc-ctrl.c

···
 
 	case VIDIOCPWCGVIDCMD:
 	{
-		ARG_DEF(struct pwc_video_command, cmd);
+		ARG_DEF(struct pwc_video_command, vcmd);
 
-		ARGR(cmd).type = pdev->type;
-		ARGR(cmd).release = pdev->release;
-		ARGR(cmd).command_len = pdev->cmd_len;
-		memcpy(&ARGR(cmd).command_buf, pdev->cmd_buf, pdev->cmd_len);
-		ARGR(cmd).bandlength = pdev->vbandlength;
-		ARGR(cmd).frame_size = pdev->frame_size;
-		ARG_OUT(cmd)
+		ARGR(vcmd).type = pdev->type;
+		ARGR(vcmd).release = pdev->release;
+		ARGR(vcmd).command_len = pdev->cmd_len;
+		memcpy(&ARGR(vcmd).command_buf, pdev->cmd_buf, pdev->cmd_len);
+		ARGR(vcmd).bandlength = pdev->vbandlength;
+		ARGR(vcmd).frame_size = pdev->frame_size;
+		ARG_OUT(vcmd)
 		break;
 	}
 	/*

drivers/media/video/usbvideo/ibmcam.c

···
 		 * make black color and quit the horizontal scanning loop.
 		 */
 		if (((frame->curline + 2) >= scanHeight) || (i >= scanLength)) {
-			const int j = i * V4L_BYTES_PER_PIXEL;
+			const int offset = i * V4L_BYTES_PER_PIXEL;
 #if USES_IBMCAM_PUTPIXEL
 			/* Refresh 'f' because we don't use it much with PUTPIXEL */
-			f = frame->data + (v4l_linesize * frame->curline) + j;
+			f = frame->data + (v4l_linesize * frame->curline) + offset;
 #endif
-			memset(f, 0, v4l_linesize - j);
+			memset(f, 0, v4l_linesize - offset);
 			break;
 		}