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 <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

4 files changed, 7 insertions, 8 deletions

diff --git a/drivers/media/dvb/dvb-core/dmxdev.c b/drivers/media/dvb/dvb-core/dmxdev.c
index 1cf9fcb6f51..069d847ba88 100644
--- a/drivers/media/dvb/dvb-core/dmxdev.c
+++ b/drivers/media/dvb/dvb-core/dmxdev.c
@@ -641,7 +641,6 @@ static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 		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;
diff --git a/drivers/media/dvb/dvb-core/dvb_ca_en50221.c b/drivers/media/dvb/dvb-core/dvb_ca_en50221.c
index 8e5dd7b1f03..98ee16773ff 100644
--- a/drivers/media/dvb/dvb-core/dvb_ca_en50221.c
+++ b/drivers/media/dvb/dvb-core/dvb_ca_en50221.c
@@ -1032,7 +1032,7 @@ static int dvb_ca_en50221_thread(void *data)
 					/* 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);
@@ -1089,7 +1089,7 @@ static int dvb_ca_en50221_thread(void *data)
 					/* 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);
diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 8cbdb218952..3526e3ee948 100644
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -889,13 +889,13 @@ static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
 			 * 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));
@@ -908,12 +908,12 @@ static int dvb_frontend_ioctl(struct inode *inode, struct file *file,
 			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);
 			}
diff --git a/drivers/media/dvb/dvb-usb/cxusb.c b/drivers/media/dvb/dvb-usb/cxusb.c
index aaa0b6f0b52..563400277a4 100644
--- a/drivers/media/dvb/dvb-usb/cxusb.c
+++ b/drivers/media/dvb/dvb-usb/cxusb.c
@@ -210,7 +210,7 @@ static int cxusb_aver_power_ctrl(struct dvb_usb_device *d, int onoff)
 	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) {