Merge tag 'fixes-for-3.13a' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First round of fixes for IIO in the 3.13 cycle.

The usual mixed bag of fixes.

* 3 cases where kconfig dependencies were missing.  We need to keep a closer
  eye on this in new drivers.

* hid_sensors was abusing the iio_dev->trigger pointer.  We had a round
  of clearing this out some time ago but this driver clearly slipped through.

* A misuse of the IIO_ST macro, in mcp3422, which we should really make a
  concertive effort to finish removing.

* Avoid a double free introduced by recent buffer reference counting in the
  one driver that (quite reasonably!) does things differently (am335x)

* A missing mutex_unlock in kxsd9 that means that driver has been non
  functional for some time and no one noticed (including me who for once
  actually has one of the supported devices).

* An incorrect assumption about the parameters of sign_extend32 in mcp3422.

So nothing controversial.  The only substantial patch is the hid_sensors
one and that is actually just adding a new pointer to the devices private
state then moving the code over to it.

15 files changed, 46 insertions, 24 deletions

diff --git a/drivers/iio/accel/hid-sensor-accel-3d.c b/drivers/iio/accel/hid-sensor-accel-3d.c
index dcda17395c4e..1cae4e920c9b 100644
--- a/drivers/iio/accel/hid-sensor-accel-3d.c
+++ b/drivers/iio/accel/hid-sensor-accel-3d.c
@@ -350,7 +350,7 @@ static int hid_accel_3d_probe(struct platform_device *pdev)
 error_iio_unreg:
         iio_device_unregister(indio_dev);
 error_remove_trigger:
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&accel_state->common_attributes);
 error_unreg_buffer_funcs:
         iio_triggered_buffer_cleanup(indio_dev);
 error_free_dev_mem:
@@ -363,10 +363,11 @@ static int hid_accel_3d_remove(struct platform_device *pdev)
 {
         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+        struct accel_3d_state *accel_state = iio_priv(indio_dev);
 
         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ACCEL_3D);
         iio_device_unregister(indio_dev);
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&accel_state->common_attributes);
         iio_triggered_buffer_cleanup(indio_dev);
         kfree(indio_dev->channels);
 
diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
index d72118d1189c..98ba761cbb9c 100644
--- a/drivers/iio/accel/kxsd9.c
+++ b/drivers/iio/accel/kxsd9.c
@@ -112,9 +112,10 @@ static int kxsd9_read(struct iio_dev *indio_dev, u8 address)
         mutex_lock(&st->buf_lock);
         st->tx[0] = KXSD9_READ(address);
         ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));
-        if (ret)
-                return ret;
-        return (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0);
+        if (!ret)
+                ret = (((u16)(st->rx[0])) << 8) | (st->rx[1] & 0xF0);
+        mutex_unlock(&st->buf_lock);
+        return ret;
 }
 
 static IIO_CONST_ATTR(accel_scale_available,
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 17df74908db1..5b1aa027c034 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -1047,6 +1047,7 @@ static int at91_adc_probe(struct platform_device *pdev)
         } else {
                 if (!st->caps->has_tsmr) {
                         dev_err(&pdev->dev, "We don't support non-TSMR adc\n");
+                        ret = -ENODEV;
                         goto error_disable_adc_clk;
                 }
 
diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c
index 12948325431c..c8c1baaec6c1 100644
--- a/drivers/iio/adc/mcp3422.c
+++ b/drivers/iio/adc/mcp3422.c
@@ -88,10 +88,10 @@ static const int mcp3422_sample_rates[4] = {
 
 /* sample rates to sign extension table */
 static const int mcp3422_sign_extend[4] = {
-        [MCP3422_SRATE_240] = 12,
-        [MCP3422_SRATE_60] = 14,
-        [MCP3422_SRATE_15] = 16,
-        [MCP3422_SRATE_3] = 18 };
+        [MCP3422_SRATE_240] = 11,
+        [MCP3422_SRATE_60] = 13,
+        [MCP3422_SRATE_15] = 15,
+        [MCP3422_SRATE_3] = 17 };
 
 /* Client data (each client gets its own) */
 struct mcp3422 {
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 728411ec7642..d4d748214e4b 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -229,12 +229,15 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev,
         unsigned long flags,
         const struct iio_buffer_setup_ops *setup_ops)
 {
+        struct iio_buffer *buffer;
         int ret;
 
-        indio_dev->buffer = iio_kfifo_allocate(indio_dev);
-        if (!indio_dev->buffer)
+        buffer = iio_kfifo_allocate(indio_dev);
+        if (!buffer)
                 return -ENOMEM;
 
+        iio_device_attach_buffer(indio_dev, buffer);
+
         ret = request_threaded_irq(irq, pollfunc_th, pollfunc_bh,
                                 flags, indio_dev->name, indio_dev);
         if (ret)
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index b6e77e0fc420..bbd6426c9726 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -55,11 +55,10 @@ static int hid_sensor_data_rdy_trigger_set_state(struct iio_trigger *trig,
         return 0;
 }
 
-void hid_sensor_remove_trigger(struct iio_dev *indio_dev)
+void hid_sensor_remove_trigger(struct hid_sensor_common *attrb)
 {
-        iio_trigger_unregister(indio_dev->trig);
-        iio_trigger_free(indio_dev->trig);
-        indio_dev->trig = NULL;
+        iio_trigger_unregister(attrb->trigger);
+        iio_trigger_free(attrb->trigger);
 }
 EXPORT_SYMBOL(hid_sensor_remove_trigger);
 
@@ -90,7 +89,7 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
                 dev_err(&indio_dev->dev, "Trigger Register Failed\n");
                 goto error_free_trig;
         }
-        indio_dev->trig = trig;
+        indio_dev->trig = attrb->trigger = trig;
 
         return ret;
 
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h
index 9a8731478eda..ca02f7811aa8 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.h
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.h
@@ -21,6 +21,6 @@
 
 int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
                                 struct hid_sensor_common *attrb);
-void hid_sensor_remove_trigger(struct iio_dev *indio_dev);
+void hid_sensor_remove_trigger(struct hid_sensor_common *attrb);
 
 #endif
diff --git a/drivers/iio/gyro/hid-sensor-gyro-3d.c b/drivers/iio/gyro/hid-sensor-gyro-3d.c
index ea01c6bcfb56..e54f0f4959d3 100644
--- a/drivers/iio/gyro/hid-sensor-gyro-3d.c
+++ b/drivers/iio/gyro/hid-sensor-gyro-3d.c
@@ -348,7 +348,7 @@ static int hid_gyro_3d_probe(struct platform_device *pdev)
 error_iio_unreg:
         iio_device_unregister(indio_dev);
 error_remove_trigger:
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&gyro_state->common_attributes);
 error_unreg_buffer_funcs:
         iio_triggered_buffer_cleanup(indio_dev);
 error_free_dev_mem:
@@ -361,10 +361,11 @@ static int hid_gyro_3d_remove(struct platform_device *pdev)
 {
         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+        struct gyro_3d_state *gyro_state = iio_priv(indio_dev);
 
         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_GYRO_3D);
         iio_device_unregister(indio_dev);
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&gyro_state->common_attributes);
         iio_triggered_buffer_cleanup(indio_dev);
         kfree(indio_dev->channels);
 
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index f98c2b509254..b0d65df3ede2 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -81,6 +81,8 @@ config SENSORS_LM3533
 config TCS3472
         tristate "TAOS TCS3472 color light-to-digital converter"
         depends on I2C
+        select IIO_BUFFER
+        select IIO_TRIGGERED_BUFFER
         help
          If you say yes here you get support for the TAOS TCS3472
          family of color light-to-digital converters with IR filter.
diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index fa6ae8cf89ea..8e8b9d722853 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -314,7 +314,7 @@ static int hid_als_probe(struct platform_device *pdev)
 error_iio_unreg:
         iio_device_unregister(indio_dev);
 error_remove_trigger:
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&als_state->common_attributes);
 error_unreg_buffer_funcs:
         iio_triggered_buffer_cleanup(indio_dev);
 error_free_dev_mem:
@@ -327,10 +327,11 @@ static int hid_als_remove(struct platform_device *pdev)
 {
         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+        struct als_state *als_state = iio_priv(indio_dev);
 
         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_ALS);
         iio_device_unregister(indio_dev);
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&als_state->common_attributes);
         iio_triggered_buffer_cleanup(indio_dev);
         kfree(indio_dev->channels);
 
diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig
index 0cf09637b35b..d86d226dcd67 100644
--- a/drivers/iio/magnetometer/Kconfig
+++ b/drivers/iio/magnetometer/Kconfig
@@ -19,6 +19,8 @@ config AK8975
 config MAG3110
         tristate "Freescale MAG3110 3-Axis Magnetometer"
         depends on I2C
+        select IIO_BUFFER
+        select IIO_TRIGGERED_BUFFER
         help
           Say yes here to build support for the Freescale MAG3110 3-Axis
           magnetometer.
diff --git a/drivers/iio/magnetometer/hid-sensor-magn-3d.c b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
index 2634920562fb..b26e1028a0a0 100644
--- a/drivers/iio/magnetometer/hid-sensor-magn-3d.c
+++ b/drivers/iio/magnetometer/hid-sensor-magn-3d.c
@@ -351,7 +351,7 @@ static int hid_magn_3d_probe(struct platform_device *pdev)
 error_iio_unreg:
         iio_device_unregister(indio_dev);
 error_remove_trigger:
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&magn_state->common_attributes);
 error_unreg_buffer_funcs:
         iio_triggered_buffer_cleanup(indio_dev);
 error_free_dev_mem:
@@ -364,10 +364,11 @@ static int hid_magn_3d_remove(struct platform_device *pdev)
 {
         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
         struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+        struct magn_3d_state *magn_state = iio_priv(indio_dev);
 
         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_COMPASS_3D);
         iio_device_unregister(indio_dev);
-        hid_sensor_remove_trigger(indio_dev);
+        hid_sensor_remove_trigger(&magn_state->common_attributes);
         iio_triggered_buffer_cleanup(indio_dev);
         kfree(indio_dev->channels);
 
diff --git a/drivers/iio/magnetometer/mag3110.c b/drivers/iio/magnetometer/mag3110.c
index 783c5b417356..becf54496967 100644
--- a/drivers/iio/magnetometer/mag3110.c
+++ b/drivers/iio/magnetometer/mag3110.c
@@ -250,7 +250,12 @@ done:
         .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
                 BIT(IIO_CHAN_INFO_SCALE), \
         .scan_index = idx, \
-        .scan_type = IIO_ST('s', 16, 16, IIO_BE), \
+        .scan_type = { \
+                .sign = 's', \
+                .realbits = 16, \
+                .storagebits = 16, \
+                .endianness = IIO_BE, \
+        }, \
 }
 
 static const struct iio_chan_spec mag3110_channels[] = {
diff --git a/drivers/staging/iio/magnetometer/Kconfig b/drivers/staging/iio/magnetometer/Kconfig
index a3ea69e9d800..34634da1f9f7 100644
--- a/drivers/staging/iio/magnetometer/Kconfig
+++ b/drivers/staging/iio/magnetometer/Kconfig
@@ -6,6 +6,8 @@ menu "Magnetometer sensors"
 config SENSORS_HMC5843
         tristate "Honeywell HMC5843/5883/5883L 3-Axis Magnetometer"
         depends on I2C
+        select IIO_BUFFER
+        select IIO_TRIGGERED_BUFFER
         help
           Say Y here to add support for the Honeywell HMC5843, HMC5883 and
           HMC5883L 3-Axis Magnetometer (digital compass).
diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h
index a265af294ea4..206a2af6b62b 100644
--- a/include/linux/hid-sensor-hub.h
+++ b/include/linux/hid-sensor-hub.h
@@ -21,6 +21,8 @@
 
 #include <linux/hid.h>
 #include <linux/hid-sensor-ids.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/trigger.h>
 
 /**
  * struct hid_sensor_hub_attribute_info - Attribute info
@@ -184,6 +186,7 @@ struct hid_sensor_common {
         struct platform_device *pdev;
         unsigned usage_id;
         bool data_ready;
+        struct iio_trigger *trigger;
         struct hid_sensor_hub_attribute_info poll;
         struct hid_sensor_hub_attribute_info report_state;
         struct hid_sensor_hub_attribute_info power_state;