staging:iio:accel:adis16204 allocate tx and rx in state plus state via iio_priv

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/accel/adis16204.h b/drivers/staging/iio/accel/adis16204.h
index 5310a42..802fc57 100644 (file)
--- a/drivers/staging/iio/accel/adis16204.h
+++ b/drivers/staging/iio/accel/adis16204.h
@@ -67,19 +67,17 @@
 /**
  * struct adis16204_state - device instance specific data
  * @us:                        actual spi_device
- * @indio_dev:         industrial I/O device structure
  * @trig:              data ready trigger registered with iio
  * @tx:                        transmit buffer
  * @rx:                        receive buffer
  * @buf_lock:          mutex to protect tx and rx
  **/
 struct adis16204_state {
-       struct spi_device               *us;
-       struct iio_dev                  *indio_dev;
-       struct iio_trigger              *trig;
-       u8                              *tx;
-       u8                              *rx;
-       struct mutex                    buf_lock;
+       struct spi_device       *us;
+       struct iio_trigger      *trig;
+       struct mutex            buf_lock;
+       u8                      tx[ADIS16204_MAX_TX] ____cacheline_aligned;
+       u8                      rx[ADIS16204_MAX_RX];
 };
 
 int adis16204_set_irq(struct iio_dev *indio_dev, bool enable);

diff --git a/drivers/staging/iio/accel/adis16204_core.c b/drivers/staging/iio/accel/adis16204_core.c
index 1680670..cfd09b3 100644 (file)
--- a/drivers/staging/iio/accel/adis16204_core.c
+++ b/drivers/staging/iio/accel/adis16204_core.c
@@ -39,7 +39,7 @@ static int adis16204_spi_write_reg_8(struct iio_dev *indio_dev,
                u8 val)
 {
        int ret;
-       struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+       struct adis16204_state *st = iio_priv(indio_dev);
 
        mutex_lock(&st->buf_lock);
        st->tx[0] = ADIS16204_WRITE_REG(reg_address);
@@ -64,7 +64,7 @@ static int adis16204_spi_write_reg_16(struct iio_dev *indio_dev,
 {
        int ret;
        struct spi_message msg;
-       struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+       struct adis16204_state *st = iio_priv(indio_dev);
        struct spi_transfer xfers[] = {
                {
                        .tx_buf = st->tx,
@@ -106,7 +106,7 @@ static int adis16204_spi_read_reg_16(struct iio_dev *indio_dev,
                                     u16 *val)
 {
        struct spi_message msg;
-       struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+       struct adis16204_state *st = iio_priv(indio_dev);
        int ret;
        struct spi_transfer xfers[] = {
                {
@@ -483,52 +483,38 @@ static const struct iio_info adis16204_info = {
 static int __devinit adis16204_probe(struct spi_device *spi)
 {
        int ret, regdone = 0;
-       struct adis16204_state *st = kzalloc(sizeof *st, GFP_KERNEL);
-       if (!st) {
-               ret =  -ENOMEM;
-               goto error_ret;
-       }
-       /* this is only used for removal purposes */
-       spi_set_drvdata(spi, st);
+       struct adis16204_state *st;
+       struct iio_dev *indio_dev;
 
-       /* Allocate the comms buffers */
-       st->rx = kzalloc(sizeof(*st->rx)*ADIS16204_MAX_RX, GFP_KERNEL);
-       if (st->rx == NULL) {
-               ret = -ENOMEM;
-               goto error_free_st;
-       }
-       st->tx = kzalloc(sizeof(*st->tx)*ADIS16204_MAX_TX, GFP_KERNEL);
-       if (st->tx == NULL) {
+       /* setup the industrialio driver allocated elements */
+       indio_dev = iio_allocate_device(sizeof(*st));
+       if (indio_dev == NULL) {
                ret = -ENOMEM;
-               goto error_free_rx;
+               goto error_ret;
        }
+       st = iio_priv(indio_dev);
+       /* this is only used for removal purposes */
+       spi_set_drvdata(spi, indio_dev);
        st->us = spi;
        mutex_init(&st->buf_lock);
-       /* setup the industrialio driver allocated elements */
-       st->indio_dev = iio_allocate_device(0);
-       if (st->indio_dev == NULL) {
-               ret = -ENOMEM;
-               goto error_free_tx;
-       }
 
-       st->indio_dev->name = spi->dev.driver->name;
-       st->indio_dev->dev.parent = &spi->dev;
-       st->indio_dev->info = &adis16204_info;
-       st->indio_dev->channels = adis16204_channels;
-       st->indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
-       st->indio_dev->dev_data = (void *)(st);
-       st->indio_dev->modes = INDIO_DIRECT_MODE;
+       indio_dev->name = spi->dev.driver->name;
+       indio_dev->dev.parent = &spi->dev;
+       indio_dev->info = &adis16204_info;
+       indio_dev->channels = adis16204_channels;
+       indio_dev->num_channels = ARRAY_SIZE(adis16204_channels);
+       indio_dev->modes = INDIO_DIRECT_MODE;
 
-       ret = adis16204_configure_ring(st->indio_dev);
+       ret = adis16204_configure_ring(indio_dev);
        if (ret)
                goto error_free_dev;
 
-       ret = iio_device_register(st->indio_dev);
+       ret = iio_device_register(indio_dev);
        if (ret)
                goto error_unreg_ring_funcs;
        regdone = 1;
 
-       ret = iio_ring_buffer_register_ex(st->indio_dev->ring, 0,
+       ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
                                          adis16204_channels,
                                          ARRAY_SIZE(adis16204_channels));
        if (ret) {
@@ -537,50 +523,40 @@ static int __devinit adis16204_probe(struct spi_device *spi)
        }
 
        if (spi->irq) {
-               ret = adis16204_probe_trigger(st->indio_dev);
+               ret = adis16204_probe_trigger(indio_dev);
                if (ret)
                        goto error_uninitialize_ring;
        }
 
        /* Get the device into a sane initial state */
-       ret = adis16204_initial_setup(st->indio_dev);
+       ret = adis16204_initial_setup(indio_dev);
        if (ret)
                goto error_remove_trigger;
        return 0;
 
 error_remove_trigger:
-       adis16204_remove_trigger(st->indio_dev);
+       adis16204_remove_trigger(indio_dev);
 error_uninitialize_ring:
-       iio_ring_buffer_unregister(st->indio_dev->ring);
+       iio_ring_buffer_unregister(indio_dev->ring);
 error_unreg_ring_funcs:
-       adis16204_unconfigure_ring(st->indio_dev);
+       adis16204_unconfigure_ring(indio_dev);
 error_free_dev:
        if (regdone)
-               iio_device_unregister(st->indio_dev);
+               iio_device_unregister(indio_dev);
        else
-               iio_free_device(st->indio_dev);
-error_free_tx:
-       kfree(st->tx);
-error_free_rx:
-       kfree(st->rx);
-error_free_st:
-       kfree(st);
+               iio_free_device(indio_dev);
 error_ret:
        return ret;
 }
 
 static int adis16204_remove(struct spi_device *spi)
 {
-       struct adis16204_state *st = spi_get_drvdata(spi);
-       struct iio_dev *indio_dev = st->indio_dev;
+       struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
        adis16204_remove_trigger(indio_dev);
-       iio_ring_buffer_unregister(st->indio_dev->ring);
+       iio_ring_buffer_unregister(indio_dev->ring);
        iio_device_unregister(indio_dev);
        adis16204_unconfigure_ring(indio_dev);
-       kfree(st->tx);
-       kfree(st->rx);
-       kfree(st);
 
        return 0;
 }

diff --git a/drivers/staging/iio/accel/adis16204_ring.c b/drivers/staging/iio/accel/adis16204_ring.c
index a2d36fb..852df06 100644 (file)
--- a/drivers/staging/iio/accel/adis16204_ring.c
+++ b/drivers/staging/iio/accel/adis16204_ring.c
@@ -26,7 +26,7 @@ static int adis16204_read_ring_data(struct device *dev, u8 *rx)
 {
        struct spi_message msg;
        struct iio_dev *indio_dev = dev_get_drvdata(dev);
-       struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+       struct adis16204_state *st = iio_priv(indio_dev);
        struct spi_transfer xfers[ADIS16204_OUTPUTS + 1];
        int ret;
        int i;
@@ -66,7 +66,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
 {
        struct iio_poll_func *pf = p;
        struct iio_dev *indio_dev = pf->private_data;
-       struct adis16204_state *st = iio_dev_get_devdata(indio_dev);
+       struct adis16204_state *st = iio_priv(indio_dev);
        struct iio_ring_buffer *ring = indio_dev->ring;
        int i = 0;
        s16 *data;
@@ -79,7 +79,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
        }
 
        if (ring->scan_count)
-               if (adis16204_read_ring_data(&st->indio_dev->dev, st->rx) >= 0)
+               if (adis16204_read_ring_data(&indio_dev->dev, st->rx) >= 0)
                        for (; i < ring->scan_count; i++)
                                data[i] = be16_to_cpup(
                                        (__be16 *)&(st->rx[i*2]));
@@ -90,7 +90,7 @@ static irqreturn_t adis16204_trigger_handler(int irq, void *p)
 
        ring->access->store_to(ring, (u8 *)data, pf->timestamp);
 
-       iio_trigger_notify_done(st->indio_dev->trig);
+       iio_trigger_notify_done(indio_dev->trig);
        kfree(data);
 
        return IRQ_HANDLED;

diff --git a/drivers/staging/iio/accel/adis16204_trigger.c b/drivers/staging/iio/accel/adis16204_trigger.c
index 5e1f9ae..01f73b9 100644 (file)
--- a/drivers/staging/iio/accel/adis16204_trigger.c
+++ b/drivers/staging/iio/accel/adis16204_trigger.c
@@ -18,17 +18,16 @@
 static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
                                                bool state)
 {
-       struct adis16204_state *st = trig->private_data;
-       struct iio_dev *indio_dev = st->indio_dev;
+       struct iio_dev *indio_dev = trig->private_data;
 
        dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-       return adis16204_set_irq(st->indio_dev, state);
+       return adis16204_set_irq(indio_dev, state);
 }
 
 int adis16204_probe_trigger(struct iio_dev *indio_dev)
 {
        int ret;
-       struct adis16204_state *st = indio_dev->dev_data;
+       struct adis16204_state *st = iio_priv(indio_dev);
 
        st->trig = iio_allocate_trigger("adis16204-dev%d", indio_dev->id);
        if (st->trig == NULL) {
@@ -46,7 +45,7 @@ int adis16204_probe_trigger(struct iio_dev *indio_dev)
 
        st->trig->dev.parent = &st->us->dev;
        st->trig->owner = THIS_MODULE;
-       st->trig->private_data = st;
+       st->trig->private_data = indio_dev;
        st->trig->set_trigger_state = &adis16204_data_rdy_trigger_set_state;
        ret = iio_trigger_register(st->trig);
 
@@ -67,7 +66,7 @@ error_ret:
 
 void adis16204_remove_trigger(struct iio_dev *indio_dev)
 {
-       struct adis16204_state *state = indio_dev->dev_data;
+       struct adis16204_state *state = iio_priv(indio_dev);
 
        iio_trigger_unregister(state->trig);
        free_irq(state->us->irq, state->trig);