Merge tag 'staging-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO fixes from Greg KH:
 "Here are some small staging/IIO driver fixes for 4.14-rc4

  Most of these have been in my tree for a while due to travels, sorry
  for the delay. They resolve a number of small issues reported by
  people, mostly for the iio drivers. Nothing major in here, full
  details are in the shortlog.

  All have been linux-next for a few weeks with no reported issues"

* tag 'staging-4.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (23 commits)
  staging: iio: ad7192: Fix - use the dedicated reset function avoiding dma from stack.
  iio: core: Return error for failed read_reg
  iio: ad7793: Fix the serial interface reset
  iio: ad_sigma_delta: Implement a dedicated reset function
  IIO: BME280: Updates to Humidity readings need ctrl_reg write!
  iio: adc: mcp320x: Fix readout of negative voltages
  iio: adc: mcp320x: Fix oops on module unload
  iio: adc: stm32: fix bad error check on max_channels
  iio: trigger: stm32-timer: fix a corner case to write preset
  iio: trigger: stm32-timer: preset shouldn't be buffered
  iio: adc: twl4030: Return an error if we can not enable the vusb3v1 regulator in 'twl4030_madc_probe()'
  iio: adc: twl4030: Disable the vusb3v1 rugulator in the error handling path of 'twl4030_madc_probe()'
  iio: adc: twl4030: Fix an error handling path in 'twl4030_madc_probe()'
  staging: rtl8723bs: avoid null pointer dereference on pmlmepriv
  staging: rtl8723bs: add missing range check on id
  staging: vchiq_2835_arm: Fix NULL ptr dereference in free_pagelist
  staging: speakup: fix speakup-r empty line lockup
  staging: pi433: Move limit check to switch default to kill warning
  staging: r8822be: fix null pointer dereferences with a null driver_adapter
  staging: mt29f_spinand: Enable the read ECC before program the page
  ...

drivers/iio/adc/ad7793.c

@@ -257,7 +257,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
 	unsigned int vref_mv)
 {
 	struct ad7793_state *st = iio_priv(indio_dev);
-	int i, ret = -1;
+	int i, ret;
 	unsigned long long scale_uv;
 	u32 id;
 
@@ -266,7 +266,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
 		return ret;
 
 	/* reset the serial interface */
-	ret = spi_write(st->sd.spi, (u8 *)&ret, sizeof(ret));
+	ret = ad_sd_reset(&st->sd, 32);
 	if (ret < 0)
 		goto out;
 	usleep_range(500, 2000); /* Wait for at least 500us */

drivers/iio/adc/ad_sigma_delta.c

@@ -177,6 +177,34 @@ out:
 }
 EXPORT_SYMBOL_GPL(ad_sd_read_reg);
 
+/**
+ * ad_sd_reset() - Reset the serial interface
+ *
+ * @sigma_delta: The sigma delta device
+ * @reset_length: Number of SCLKs with DIN = 1
+ *
+ * Returns 0 on success, an error code otherwise.
+ **/
+int ad_sd_reset(struct ad_sigma_delta *sigma_delta,
+	unsigned int reset_length)
+{
+	uint8_t *buf;
+	unsigned int size;
+	int ret;
+
+	size = DIV_ROUND_UP(reset_length, 8);
+	buf = kcalloc(size, sizeof(*buf), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	memset(buf, 0xff, size);
+	ret = spi_write(sigma_delta->spi, buf, size);
+	kfree(buf);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(ad_sd_reset);
+
 static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta,
 	unsigned int mode, unsigned int channel)
 {

drivers/iio/adc/mcp320x.c

@@ -17,6 +17,8 @@
  * MCP3204
  * MCP3208
  * ------------
+ * 13 bit converter
+ * MCP3301
  *
  * Datasheet can be found here:
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21293C.pdf  mcp3001
@@ -96,7 +98,7 @@ static int mcp320x_channel_to_tx_data(int device_index,
 }
 
 static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel,
-				  bool differential, int device_index)
+				  bool differential, int device_index, int *val)
 {
 	int ret;
 
@@ -117,19 +119,25 @@ static int mcp320x_adc_conversion(struct mcp320x *adc, u8 channel,
 
 	switch (device_index) {
 	case mcp3001:
-		return (adc->rx_buf[0] << 5 | adc->rx_buf[1] >> 3);
+		*val = (adc->rx_buf[0] << 5 | adc->rx_buf[1] >> 3);
+		return 0;
 	case mcp3002:
 	case mcp3004:
 	case mcp3008:
-		return (adc->rx_buf[0] << 2 | adc->rx_buf[1] >> 6);
+		*val = (adc->rx_buf[0] << 2 | adc->rx_buf[1] >> 6);
+		return 0;
 	case mcp3201:
-		return (adc->rx_buf[0] << 7 | adc->rx_buf[1] >> 1);
+		*val = (adc->rx_buf[0] << 7 | adc->rx_buf[1] >> 1);
+		return 0;
 	case mcp3202:
 	case mcp3204:
 	case mcp3208:
-		return (adc->rx_buf[0] << 4 | adc->rx_buf[1] >> 4);
+		*val = (adc->rx_buf[0] << 4 | adc->rx_buf[1] >> 4);
+		return 0;
 	case mcp3301:
-		return sign_extend32((adc->rx_buf[0] & 0x1f) << 8 | adc->rx_buf[1], 12);
+		*val = sign_extend32((adc->rx_buf[0] & 0x1f) << 8
+				    | adc->rx_buf[1], 12);
+		return 0;
 	default:
 		return -EINVAL;
 	}
@@ -150,12 +158,10 @@ static int mcp320x_read_raw(struct iio_dev *indio_dev,
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
 		ret = mcp320x_adc_conversion(adc, channel->address,
-			channel->differential, device_index);
-
+			channel->differential, device_index, val);
 		if (ret < 0)
 			goto out;
 
-		*val = ret;
 		ret = IIO_VAL_INT;
 		break;
 
@@ -312,6 +318,7 @@ static int mcp320x_probe(struct spi_device *spi)
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &mcp320x_info;
+	spi_set_drvdata(spi, indio_dev);
 
 	chip_info = &mcp320x_chip_infos[spi_get_device_id(spi)->driver_data];
 	indio_dev->channels = chip_info->channels;

drivers/iio/adc/stm32-adc.c

@@ -1666,7 +1666,7 @@ static int stm32_adc_chan_of_init(struct iio_dev *indio_dev)
 
 	num_channels = of_property_count_u32_elems(node, "st,adc-channels");
 	if (num_channels < 0 ||
-	    num_channels >= adc_info->max_channels) {
+	    num_channels > adc_info->max_channels) {
 		dev_err(&indio_dev->dev, "Bad st,adc-channels?\n");
 		return num_channels < 0 ? num_channels : -EINVAL;
 	}

drivers/iio/adc/ti-ads1015.c

@@ -52,7 +52,7 @@
 
 #define ADS1015_CFG_COMP_QUE_MASK	GENMASK(1, 0)
 #define ADS1015_CFG_COMP_LAT_MASK	BIT(2)
-#define ADS1015_CFG_COMP_POL_MASK	BIT(2)
+#define ADS1015_CFG_COMP_POL_MASK	BIT(3)
 #define ADS1015_CFG_COMP_MODE_MASK	BIT(4)
 #define ADS1015_CFG_DR_MASK	GENMASK(7, 5)
 #define ADS1015_CFG_MOD_MASK	BIT(8)
@@ -1017,10 +1017,12 @@ static int ads1015_probe(struct i2c_client *client,
 
 		switch (irq_trig) {
 		case IRQF_TRIGGER_LOW:
-			cfg_comp |= ADS1015_CFG_COMP_POL_LOW;
+			cfg_comp |= ADS1015_CFG_COMP_POL_LOW <<
+					ADS1015_CFG_COMP_POL_SHIFT;
 			break;
 		case IRQF_TRIGGER_HIGH:
-			cfg_comp |= ADS1015_CFG_COMP_POL_HIGH;
+			cfg_comp |= ADS1015_CFG_COMP_POL_HIGH <<
+					ADS1015_CFG_COMP_POL_SHIFT;
 			break;
 		default:
 			return -EINVAL;

drivers/iio/adc/twl4030-madc.c

@@ -887,21 +887,27 @@ static int twl4030_madc_probe(struct platform_device *pdev)
 
 	/* Enable 3v1 bias regulator for MADC[3:6] */
 	madc->usb3v1 = devm_regulator_get(madc->dev, "vusb3v1");
-	if (IS_ERR(madc->usb3v1))
-		return -ENODEV;
+	if (IS_ERR(madc->usb3v1)) {
+		ret = -ENODEV;
+		goto err_i2c;
+	}
 
 	ret = regulator_enable(madc->usb3v1);
-	if (ret)
+	if (ret) {
 		dev_err(madc->dev, "could not enable 3v1 bias regulator\n");
+		goto err_i2c;
+	}
 
 	ret = iio_device_register(iio_dev);
 	if (ret) {
 		dev_err(&pdev->dev, "could not register iio device\n");
-		goto err_i2c;
+		goto err_usb3v1;
 	}
 
 	return 0;
 
+err_usb3v1:
+	regulator_disable(madc->usb3v1);
 err_i2c:
 	twl4030_madc_set_current_generator(madc, 0, 0);
 err_current_generator:

drivers/iio/common/st_sensors/st_sensors_core.c

@@ -463,8 +463,17 @@ int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable)
 	u8 drdy_mask;
 	struct st_sensor_data *sdata = iio_priv(indio_dev);
 
-	if (!sdata->sensor_settings->drdy_irq.addr)
+	if (!sdata->sensor_settings->drdy_irq.addr) {
+		/*
+		 * there are some devices (e.g. LIS3MDL) where drdy line is
+		 * routed to a given pin and it is not possible to select a
+		 * different one. Take into account irq status register
+		 * to understand if irq trigger can be properly supported
+		 */
+		if (sdata->sensor_settings->drdy_irq.addr_stat_drdy)
+			sdata->hw_irq_trigger = enable;
 		return 0;
+	}
 
 	/* Enable/Disable the interrupt generator 1. */
 	if (sdata->sensor_settings->drdy_irq.ig1.en_addr > 0) {

drivers/iio/industrialio-core.c

@@ -310,8 +310,10 @@ static ssize_t iio_debugfs_read_reg(struct file *file, char __user *userbuf,
 	ret = indio_dev->info->debugfs_reg_access(indio_dev,
 						  indio_dev->cached_reg_addr,
 						  0, &val);
-	if (ret)
+	if (ret) {
 		dev_err(indio_dev->dev.parent, "%s: read failed\n", __func__);
+		return ret;
+	}
 
 	len = snprintf(buf, sizeof(buf), "0x%X\n", val);
 

drivers/iio/magnetometer/st_magn_core.c

@@ -315,6 +315,10 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
 				},
 			},
 		},
+		.drdy_irq = {
+			/* drdy line is routed drdy pin */
+			.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
+		},
 		.multi_read_bit = true,
 		.bootime = 2,
 	},

drivers/iio/pressure/bmp280-core.c

@@ -573,7 +573,7 @@ static int bmp280_chip_config(struct bmp280_data *data)
 	u8 osrs = BMP280_OSRS_TEMP_X(data->oversampling_temp + 1) |
 		  BMP280_OSRS_PRESS_X(data->oversampling_press + 1);
 
-	ret = regmap_update_bits(data->regmap, BMP280_REG_CTRL_MEAS,
+	ret = regmap_write_bits(data->regmap, BMP280_REG_CTRL_MEAS,
 				 BMP280_OSRS_TEMP_MASK |
 				 BMP280_OSRS_PRESS_MASK |
 				 BMP280_MODE_MASK,

drivers/iio/trigger/stm32-timer-trigger.c

@@ -174,6 +174,7 @@ static void stm32_timer_stop(struct stm32_timer_trigger *priv)
 		clk_disable(priv->clk);
 
 	/* Stop timer */
+	regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0);
 	regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN, 0);
 	regmap_write(priv->regmap, TIM_PSC, 0);
 	regmap_write(priv->regmap, TIM_ARR, 0);
@@ -715,8 +716,9 @@ static ssize_t stm32_count_set_preset(struct iio_dev *indio_dev,
 	if (ret)
 		return ret;
 
+	/* TIMx_ARR register shouldn't be buffered (ARPE=0) */
+	regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, 0);
 	regmap_write(priv->regmap, TIM_ARR, preset);
-	regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_ARPE, TIM_CR1_ARPE);
 
 	return len;
 }

drivers/staging/iio/adc/ad7192.c

@@ -223,11 +223,9 @@ static int ad7192_setup(struct ad7192_state *st,
 	struct iio_dev *indio_dev = spi_get_drvdata(st->sd.spi);
 	unsigned long long scale_uv;
 	int i, ret, id;
-	u8 ones[6];
 
 	/* reset the serial interface */
-	memset(&ones, 0xFF, 6);
-	ret = spi_write(st->sd.spi, &ones, 6);
+	ret = ad_sd_reset(&st->sd, 48);
 	if (ret < 0)
 		goto out;
 	usleep_range(500, 1000); /* Wait for at least 500us */

drivers/staging/mt29f_spinand/mt29f_spinand.c

@@ -496,8 +496,12 @@ static int spinand_program_page(struct spi_device *spi_nand,
 	if (!wbuf)
 		return -ENOMEM;
 
-	enable_read_hw_ecc = 0;
-	spinand_read_page(spi_nand, page_id, 0, CACHE_BUF, wbuf);
+	enable_read_hw_ecc = 1;
+	retval = spinand_read_page(spi_nand, page_id, 0, CACHE_BUF, wbuf);
+	if (retval < 0) {
+		dev_err(&spi_nand->dev, "ecc error on read page!!!\n");
+		return retval;
+	}
 
 	for (i = offset, j = 0; i < len; i++, j++)
 		wbuf[i] &= buf[j];

drivers/staging/pi433/rf69.c

@@ -570,12 +570,6 @@ int rf69_set_dio_mapping(struct spi_device *spi, u8 DIONumber, u8 value)
 		dev_dbg(&spi->dev, "set: DIO mapping");
 	#endif
 
-	// check DIO number
-	if (DIONumber > 5) {
-		dev_dbg(&spi->dev, "set: illegal input param");
-		return -EINVAL;
-	}
-
 	switch (DIONumber) {
 	case 0: mask=MASK_DIO0; shift=SHIFT_DIO0; regaddr=REG_DIOMAPPING1; break;
 	case 1: mask=MASK_DIO1; shift=SHIFT_DIO1; regaddr=REG_DIOMAPPING1; break;
@@ -583,6 +577,9 @@ int rf69_set_dio_mapping(struct spi_device *spi, u8 DIONumber, u8 value)
 	case 3: mask=MASK_DIO3; shift=SHIFT_DIO3; regaddr=REG_DIOMAPPING1; break;
 	case 4: mask=MASK_DIO4; shift=SHIFT_DIO4; regaddr=REG_DIOMAPPING2; break;
 	case 5: mask=MASK_DIO5; shift=SHIFT_DIO5; regaddr=REG_DIOMAPPING2; break;
+	default:
+		dev_dbg(&spi->dev, "set: illegal input param");
+		return -EINVAL;
 	}
 
 	// read reg

drivers/staging/rtl8723bs/core/rtw_mlme.c

@@ -119,9 +119,8 @@ void rtw_free_mlme_priv_ie_data(struct mlme_priv *pmlmepriv)
 
 void _rtw_free_mlme_priv(struct mlme_priv *pmlmepriv)
 {
-	rtw_free_mlme_priv_ie_data(pmlmepriv);
-
 	if (pmlmepriv) {
+		rtw_free_mlme_priv_ie_data(pmlmepriv);
 		if (pmlmepriv->free_bss_buf) {
 			vfree(pmlmepriv->free_bss_buf);
 		}

drivers/staging/rtl8723bs/os_dep/rtw_proc.c

@@ -311,6 +311,8 @@ static ssize_t proc_set_cam(struct file *file, const char __user *buffer, size_t
 
 		if (num < 2)
 			return count;
+		if (id >= TOTAL_CAM_ENTRY)
+			return -EINVAL;
 
 		if (strcmp("c", cmd) == 0) {
 			_clear_cam_entry(adapter, id);

drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_api_88xx.c

@@ -2901,11 +2901,11 @@ halmac_update_datapack_88xx(struct halmac_adapter *halmac_adapter,
 	if (halmac_adapter->fw_version.h2c_version < 4)
 		return HALMAC_RET_FW_NO_SUPPORT;
 
+	driver_adapter = halmac_adapter->driver_adapter;
+
 	HALMAC_RT_TRACE(driver_adapter, HALMAC_MSG_H2C, DBG_DMESG,
 			"[TRACE]%s ==========>\n", __func__);
 
-	driver_adapter = halmac_adapter->driver_adapter;
-
 	HALMAC_RT_TRACE(driver_adapter, HALMAC_MSG_H2C, DBG_DMESG,
 			"[TRACE]%s <==========\n", __func__);
 

drivers/staging/rtlwifi/halmac/halmac_88xx/halmac_func_88xx.c

@@ -1618,10 +1618,11 @@ halmac_send_h2c_set_pwr_mode_88xx(struct halmac_adapter *halmac_adapter,
 	void *driver_adapter = NULL;
 	enum halmac_ret_status status = HALMAC_RET_SUCCESS;
 
+	driver_adapter = halmac_adapter->driver_adapter;
+
 	HALMAC_RT_TRACE(driver_adapter, HALMAC_MSG_H2C, DBG_DMESG,
 			"%s!!\n", __func__);
 
-	driver_adapter = halmac_adapter->driver_adapter;
 	h2c_header = h2c_buff;
 	h2c_cmd = h2c_header + HALMAC_H2C_CMD_HDR_SIZE_88XX;
 
@@ -1713,10 +1714,11 @@ halmac_media_status_rpt_88xx(struct halmac_adapter *halmac_adapter, u8 op_mode,
 	void *driver_adapter = NULL;
 	enum halmac_ret_status status = HALMAC_RET_SUCCESS;
 
+	driver_adapter = halmac_adapter->driver_adapter;
+
 	HALMAC_RT_TRACE(driver_adapter, HALMAC_MSG_H2C, DBG_DMESG,
 			"halmac_send_h2c_set_pwr_mode_88xx!!\n");
 
-	driver_adapter = halmac_adapter->driver_adapter;
 	h2c_header = H2c_buff;
 	h2c_cmd = h2c_header + HALMAC_H2C_CMD_HDR_SIZE_88XX;
 
@@ -2143,10 +2145,11 @@ halmac_func_ctrl_ch_switch_88xx(struct halmac_adapter *halmac_adapter,
 	enum halmac_cmd_process_status *process_status =
 		&halmac_adapter->halmac_state.scan_state_set.process_status;
 
+	driver_adapter = halmac_adapter->driver_adapter;
+
 	HALMAC_RT_TRACE(driver_adapter, HALMAC_MSG_H2C, DBG_DMESG,
 			"halmac_ctrl_ch_switch!!\n");
 
-	driver_adapter = halmac_adapter->driver_adapter;
 	halmac_api = (struct halmac_api *)halmac_adapter->halmac_api;
 
 	if (halmac_transition_scan_state_88xx(
@@ -2276,15 +2279,13 @@ enum halmac_ret_status halmac_send_h2c_update_bcn_parse_info_88xx(
 {
 	u8 h2c_buff[HALMAC_H2C_CMD_SIZE_88XX] = {0};
 	u16 h2c_seq_mum = 0;
-	void *driver_adapter = NULL;
+	void *driver_adapter = halmac_adapter->driver_adapter;
 	struct halmac_h2c_header_info h2c_header_info;
 	enum halmac_ret_status status = HALMAC_RET_SUCCESS;
 
 	HALMAC_RT_TRACE(driver_adapter, HALMAC_MSG_H2C, DBG_DMESG,
 			"%s!!\n", __func__);
 
-	driver_adapter = halmac_adapter->driver_adapter;
-
 	UPDATE_BEACON_PARSING_INFO_SET_FUNC_EN(h2c_buff, bcn_ie_info->func_en);
 	UPDATE_BEACON_PARSING_INFO_SET_SIZE_TH(h2c_buff, bcn_ie_info->size_th);
 	UPDATE_BEACON_PARSING_INFO_SET_TIMEOUT(h2c_buff, bcn_ie_info->timeout);

drivers/staging/speakup/main.c

@@ -1376,6 +1376,8 @@ static void reset_highlight_buffers(struct vc_data *);
 
 static int read_all_key;
 
+static int in_keyboard_notifier;
+
 static void start_read_all_timer(struct vc_data *vc, int command);
 
 enum {
@@ -1408,7 +1410,10 @@ static void read_all_doc(struct vc_data *vc)
 	cursor_track = read_all_mode;
 	spk_reset_index_count(0);
 	if (get_sentence_buf(vc, 0) == -1) {
-		kbd_fakekey2(vc, RA_DOWN_ARROW);
+		del_timer(&cursor_timer);
+		if (!in_keyboard_notifier)
+			speakup_fake_down_arrow();
+		start_read_all_timer(vc, RA_DOWN_ARROW);
 	} else {
 		say_sentence_num(0, 0);
 		synth_insert_next_index(0);
@@ -2212,8 +2217,10 @@ static int keyboard_notifier_call(struct notifier_block *nb,
 	int ret = NOTIFY_OK;
 	static int keycode;	/* to hold the current keycode */
 
+	in_keyboard_notifier = 1;
+
 	if (vc->vc_mode == KD_GRAPHICS)
-		return ret;
+		goto out;
 
 	/*
 	 * First, determine whether we are handling a fake keypress on
@@ -2225,7 +2232,7 @@ static int keyboard_notifier_call(struct notifier_block *nb,
 	 */
 
 	if (speakup_fake_key_pressed())
-		return ret;
+		goto out;
 
 	switch (code) {
 	case KBD_KEYCODE:
@@ -2266,6 +2273,8 @@ static int keyboard_notifier_call(struct notifier_block *nb,
 			break;
 		}
 	}
+out:
+	in_keyboard_notifier = 0;
 	return ret;
 }
 

drivers/staging/unisys/visorbus/visorchipset.c

@@ -1826,7 +1826,7 @@ static __init int visorutil_spar_detect(void)
 	return 0;
 }
 
-static int init_unisys(void)
+static int __init init_unisys(void)
 {
 	int result;
 
@@ -1841,7 +1841,7 @@ static int init_unisys(void)
 	return 0;
 };
 
-static void exit_unisys(void)
+static void __exit exit_unisys(void)
 {
 	acpi_bus_unregister_driver(&unisys_acpi_driver);
 }

drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c

@@ -612,18 +612,20 @@ free_pagelist(struct vchiq_pagelist_info *pagelistinfo,
 			if (head_bytes > actual)
 				head_bytes = actual;
 
-			memcpy((char *)page_address(pages[0]) +
+			memcpy((char *)kmap(pages[0]) +
 				pagelist->offset,
 				fragments,
 				head_bytes);
+			kunmap(pages[0]);
 		}
 		if ((actual >= 0) && (head_bytes < actual) &&
 			(tail_bytes != 0)) {
-			memcpy((char *)page_address(pages[num_pages - 1]) +
+			memcpy((char *)kmap(pages[num_pages - 1]) +
 				((pagelist->offset + actual) &
 				(PAGE_SIZE - 1) & ~(g_cache_line_size - 1)),
 				fragments + g_cache_line_size,
 				tail_bytes);
+			kunmap(pages[num_pages - 1]);
 		}
 
 		down(&g_free_fragments_mutex);

include/linux/iio/adc/ad_sigma_delta.h

@@ -111,6 +111,9 @@ int ad_sd_write_reg(struct ad_sigma_delta *sigma_delta, unsigned int reg,
 int ad_sd_read_reg(struct ad_sigma_delta *sigma_delta, unsigned int reg,
 	unsigned int size, unsigned int *val);
 
+int ad_sd_reset(struct ad_sigma_delta *sigma_delta,
+	unsigned int reset_length);
+
 int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev,
 	const struct iio_chan_spec *chan, int *val);
 int ad_sd_calibrate_all(struct ad_sigma_delta *sigma_delta,