Merge 4.0-rc7 into staging-next

We want those fixes (iio primarily) into the -next branch to help with
merge and testing issues.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 44 insertions, 37 deletions

diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
index 5613f3ab9f96..17d4bb15be4d 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
@@ -410,42 +410,46 @@ error_read_raw:
 	}
 }
 
-static int inv_mpu6050_write_fsr(struct inv_mpu6050_state *st, int fsr)
+static int inv_mpu6050_write_gyro_scale(struct inv_mpu6050_state *st, int val)
 {
-	int result;
+	int result, i;
 	u8 d;
 
-	if (fsr < 0 || fsr > INV_MPU6050_MAX_GYRO_FS_PARAM)
-		return -EINVAL;
-	if (fsr == st->chip_config.fsr)
-		return 0;
+	for (i = 0; i < ARRAY_SIZE(gyro_scale_6050); ++i) {
+		if (gyro_scale_6050[i] == val) {
+			d = (i << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
+			result = inv_mpu6050_write_reg(st,
+					st->reg->gyro_config, d);
+			if (result)
+				return result;
 
-	d = (fsr << INV_MPU6050_GYRO_CONFIG_FSR_SHIFT);
-	result = inv_mpu6050_write_reg(st, st->reg->gyro_config, d);
-	if (result)
-		return result;
-	st->chip_config.fsr = fsr;
+			st->chip_config.fsr = i;
+			return 0;
+		}
+	}
 
-	return 0;
+	return -EINVAL;
 }
 
-static int inv_mpu6050_write_accel_fs(struct inv_mpu6050_state *st, int fs)
+static int inv_mpu6050_write_accel_scale(struct inv_mpu6050_state *st, int val)
 {
-	int result;
+	int result, i;
 	u8 d;
 
-	if (fs < 0 || fs > INV_MPU6050_MAX_ACCL_FS_PARAM)
-		return -EINVAL;
-	if (fs == st->chip_config.accl_fs)
-		return 0;
+	for (i = 0; i < ARRAY_SIZE(accel_scale); ++i) {
+		if (accel_scale[i] == val) {
+			d = (i << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
+			result = inv_mpu6050_write_reg(st,
+					st->reg->accl_config, d);
+			if (result)
+				return result;
 
-	d = (fs << INV_MPU6050_ACCL_CONFIG_FSR_SHIFT);
-	result = inv_mpu6050_write_reg(st, st->reg->accl_config, d);
-	if (result)
-		return result;
-	st->chip_config.accl_fs = fs;
+			st->chip_config.accl_fs = i;
+			return 0;
+		}
+	}
 
-	return 0;
+	return -EINVAL;
 }
 
 static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
@@ -471,10 +475,10 @@ static int inv_mpu6050_write_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_SCALE:
 		switch (chan->type) {
 		case IIO_ANGL_VEL:
-			result = inv_mpu6050_write_fsr(st, val);
+			result = inv_mpu6050_write_gyro_scale(st, val2);
 			break;
 		case IIO_ACCEL:
-			result = inv_mpu6050_write_accel_fs(st, val);
+			result = inv_mpu6050_write_accel_scale(st, val2);
 			break;
 		default:
 			result = -EINVAL;
diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
index 0cd306a72a6e..ba27e277511f 100644
--- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
+++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
@@ -24,6 +24,16 @@
 #include <linux/poll.h>
 #include "inv_mpu_iio.h"
 
+static void inv_clear_kfifo(struct inv_mpu6050_state *st)
+{
+	unsigned long flags;
+
+	/* take the spin lock sem to avoid interrupt kick in */
+	spin_lock_irqsave(&st->time_stamp_lock, flags);
+	kfifo_reset(&st->timestamps);
+	spin_unlock_irqrestore(&st->time_stamp_lock, flags);
+}
+
 int inv_reset_fifo(struct iio_dev *indio_dev)
 {
 	int result;
@@ -50,6 +60,10 @@ int inv_reset_fifo(struct iio_dev *indio_dev)
 					INV_MPU6050_BIT_FIFO_RST);
 	if (result)
 		goto reset_fifo_fail;
+
+	/* clear timestamps fifo */
+	inv_clear_kfifo(st);
+
 	/* enable interrupt */
 	if (st->chip_config.accl_fifo_enable ||
 	    st->chip_config.gyro_fifo_enable) {
@@ -83,16 +97,6 @@ reset_fifo_fail:
 	return result;
 }
 
-static void inv_clear_kfifo(struct inv_mpu6050_state *st)
-{
-	unsigned long flags;
-
-	/* take the spin lock sem to avoid interrupt kick in */
-	spin_lock_irqsave(&st->time_stamp_lock, flags);
-	kfifo_reset(&st->timestamps);
-	spin_unlock_irqrestore(&st->time_stamp_lock, flags);
-}
-
 /**
  * inv_mpu6050_irq_handler() - Cache a timestamp at each data ready interrupt.
  */
@@ -184,7 +188,6 @@ end_session:
 flush_fifo:
 	/* Flush HW and SW FIFOs. */
 	inv_reset_fifo(indio_dev);
-	inv_clear_kfifo(st);
 	mutex_unlock(&indio_dev->mlock);
 	iio_trigger_notify_done(indio_dev->trig);