--- zzzz-none-000/linux-3.10.107/drivers/media/usb/usbvision/usbvision-core.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/media/usb/usbvision/usbvision-core.c	2021-02-04 17:41:59.000000000 +0000
@@ -1367,7 +1367,7 @@
 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
 {
 	int err_code = 0;
-	unsigned char buffer[1];
+	unsigned char *buffer = usbvision->ctrl_urb_buffer;
 
 	if (!USBVISION_IS_OPERATIONAL(usbvision))
 		return -1;
@@ -1401,10 +1401,12 @@
 	if (!USBVISION_IS_OPERATIONAL(usbvision))
 		return 0;
 
+	usbvision->ctrl_urb_buffer[0] = value;
 	err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
 				USBVISION_OP_CODE,
 				USB_DIR_OUT | USB_TYPE_VENDOR |
-				USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
+				USB_RECIP_ENDPOINT, 0, (__u16) reg,
+				usbvision->ctrl_urb_buffer, 1, HZ);
 
 	if (err_code < 0) {
 		dev_err(&usbvision->dev->dev,
@@ -1463,8 +1465,6 @@
 
 static int usbvision_init_compression(struct usb_usbvision *usbvision)
 {
-	int err_code = 0;
-
 	usbvision->last_isoc_frame_num = -1;
 	usbvision->isoc_data_count = 0;
 	usbvision->isoc_packet_count = 0;
@@ -1475,7 +1475,7 @@
 	usbvision->request_intra = 1;
 	usbvision->isoc_measure_bandwidth_count = 0;
 
-	return err_code;
+	return 0;
 }
 
 /* this function measures the used bandwidth since last call
@@ -1484,11 +1484,9 @@
  */
 static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
 {
-	int err_code = 0;
-
 	if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
 		usbvision->isoc_measure_bandwidth_count++;
-		return err_code;
+		return 0;
 	}
 	if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
 		usbvision->used_bandwidth = usbvision->isoc_data_count /
@@ -1499,7 +1497,7 @@
 	usbvision->isoc_data_count = 0;
 	usbvision->isoc_packet_count = 0;
 	usbvision->isoc_skip_count = 0;
-	return err_code;
+	return 0;
 }
 
 static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
@@ -1546,26 +1544,24 @@
 
 static int usbvision_request_intra(struct usb_usbvision *usbvision)
 {
-	int err_code = 0;
 	unsigned char buffer[1];
 
 	PDEBUG(DBG_IRQ, "");
 	usbvision->request_intra = 1;
 	buffer[0] = 1;
 	usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
-	return err_code;
+	return 0;
 }
 
 static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
 {
-	int err_code = 0;
 	unsigned char buffer[1];
 
 	PDEBUG(DBG_IRQ, "");
 	usbvision->request_intra = 0;
 	buffer[0] = 0;
 	usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
-	return err_code;
+	return 0;
 }
 
 /*******************************
@@ -1602,7 +1598,7 @@
 		{ 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
 		{ 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
 	};
-	char value[3];
+	unsigned char *value = usbvision->ctrl_urb_buffer;
 
 	/* the only difference between PAL and NTSC init_values */
 	if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
@@ -1641,8 +1637,8 @@
 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
 {
 	static const char proc[] = "usbvision_set_video_format";
+	unsigned char *value = usbvision->ctrl_urb_buffer;
 	int rc;
-	unsigned char value[2];
 
 	if (!USBVISION_IS_OPERATIONAL(usbvision))
 		return 0;
@@ -1683,7 +1679,7 @@
 	int err_code = 0;
 	int usb_width, usb_height;
 	unsigned int frame_rate = 0, frame_drop = 0;
-	unsigned char value[4];
+	unsigned char *value = usbvision->ctrl_urb_buffer;
 
 	if (!USBVISION_IS_OPERATIONAL(usbvision))
 		return 0;
@@ -1795,10 +1791,6 @@
 		usbvision->num_frames--;
 	}
 
-	spin_lock_init(&usbvision->queue_lock);
-	init_waitqueue_head(&usbvision->wait_frame);
-	init_waitqueue_head(&usbvision->wait_stream);
-
 	/* Allocate all buffers */
 	for (i = 0; i < usbvision->num_frames; i++) {
 		usbvision->frame[i].index = i;
@@ -1878,7 +1870,7 @@
 {
 	static const char proc[] = "usbvision_set_compresion_params: ";
 	int rc;
-	unsigned char value[6];
+	unsigned char *value = usbvision->ctrl_urb_buffer;
 
 	value[0] = 0x0F;    /* Intra-Compression cycle */
 	value[1] = 0x01;    /* Reg.45 one line per strip */
@@ -1952,7 +1944,7 @@
 {
 	static const char proc[] = "usbvision_set_input: ";
 	int rc;
-	unsigned char value[8];
+	unsigned char *value = usbvision->ctrl_urb_buffer;
 	unsigned char dvi_yuv_value;
 
 	if (!USBVISION_IS_OPERATIONAL(usbvision))
@@ -2068,8 +2060,8 @@
 
 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
 {
+	unsigned char *value = usbvision->ctrl_urb_buffer;
 	int rc;
-	unsigned char value[8];
 
 	if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) {
 		value[0] = 0x42;
@@ -2167,56 +2159,6 @@
 
 
 /*
- * usbvision timer stuff
- */
-
-/* to call usbvision_power_off from task queue */
-static void call_usbvision_power_off(struct work_struct *work)
-{
-	struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, power_off_work);
-
-	PDEBUG(DBG_FUNC, "");
-	if (mutex_lock_interruptible(&usbvision->v4l2_lock))
-		return;
-
-	if (usbvision->user == 0) {
-		usbvision_i2c_unregister(usbvision);
-
-		usbvision_power_off(usbvision);
-		usbvision->initialized = 0;
-	}
-	mutex_unlock(&usbvision->v4l2_lock);
-}
-
-static void usbvision_power_off_timer(unsigned long data)
-{
-	struct usb_usbvision *usbvision = (void *)data;
-
-	PDEBUG(DBG_FUNC, "");
-	del_timer(&usbvision->power_off_timer);
-	INIT_WORK(&usbvision->power_off_work, call_usbvision_power_off);
-	(void) schedule_work(&usbvision->power_off_work);
-}
-
-void usbvision_init_power_off_timer(struct usb_usbvision *usbvision)
-{
-	init_timer(&usbvision->power_off_timer);
-	usbvision->power_off_timer.data = (long)usbvision;
-	usbvision->power_off_timer.function = usbvision_power_off_timer;
-}
-
-void usbvision_set_power_off_timer(struct usb_usbvision *usbvision)
-{
-	mod_timer(&usbvision->power_off_timer, jiffies + USBVISION_POWEROFF_TIME);
-}
-
-void usbvision_reset_power_off_timer(struct usb_usbvision *usbvision)
-{
-	if (timer_pending(&usbvision->power_off_timer))
-		del_timer(&usbvision->power_off_timer);
-}
-
-/*
  * usbvision_begin_streaming()
  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
  * idea about the rest
@@ -2397,8 +2339,8 @@
 
 	/* Submit all URBs */
 	for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
-			err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
-						 GFP_KERNEL);
+		err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
+					 GFP_KERNEL);
 		if (err_code) {
 			dev_err(&usbvision->dev->dev,
 				"%s: usb_submit_urb(%d) failed: error %d\n",
@@ -2508,11 +2450,3 @@
 	usbvision_set_audio(usbvision, audio[channel]);
 	return 0;
 }
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-basic-offset: 8
- * End:
- */