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iio: buffer: Switch to bitmap_zalloc()

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Switch to bitmap_zalloc() to show clearly what we are allocating.
Besides that it returns pointer of bitmap type instead of opaque void *.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andy Shevchenko 2019-03-04 10:55:40 +02:00 committed by Jonathan Cameron
parent 74c420e0a5
commit 3862828a90
2 changed files with 15 additions and 19 deletions
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10
drivers/iio/buffer/industrialio-buffer-cb.c
View File

@ -36,7 +36,8 @@ static int iio_buffer_cb_store_to(struct iio_buffer *buffer, const void *data)
static void iio_buffer_cb_release(struct iio_buffer *buffer)
{
struct iio_cb_buffer *cb_buff = buffer_to_cb_buffer(buffer);
kfree(cb_buff->buffer.scan_mask);
bitmap_free(cb_buff->buffer.scan_mask);
kfree(cb_buff);
}
@ -74,9 +75,8 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,
}
cb_buff->indio_dev = cb_buff->channels[0].indio_dev;
cb_buff->buffer.scan_mask
= kcalloc(BITS_TO_LONGS(cb_buff->indio_dev->masklength),
sizeof(long), GFP_KERNEL);
cb_buff->buffer.scan_mask = bitmap_zalloc(cb_buff->indio_dev->masklength,
GFP_KERNEL);
if (cb_buff->buffer.scan_mask == NULL) {
ret = -ENOMEM;
goto error_release_channels;
@ -95,7 +95,7 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,
return cb_buff;
error_free_scan_mask:
kfree(cb_buff->buffer.scan_mask);
bitmap_free(cb_buff->buffer.scan_mask);
error_release_channels:
iio_channel_release_all(cb_buff->channels);
error_free_cb_buff:

24
drivers/iio/industrialio-buffer.c
View File

@ -320,9 +320,7 @@ static int iio_scan_mask_set(struct iio_dev *indio_dev,
const unsigned long *mask;
unsigned long *trialmask;
trialmask = kmalloc_array(BITS_TO_LONGS(indio_dev->masklength),
sizeof(*trialmask),
GFP_KERNEL);
trialmask = bitmap_alloc(indio_dev->masklength, GFP_KERNEL);
if (trialmask == NULL)
return -ENOMEM;
if (!indio_dev->masklength) {
@ -344,12 +342,12 @@ static int iio_scan_mask_set(struct iio_dev *indio_dev,
}
bitmap_copy(buffer->scan_mask, trialmask, indio_dev->masklength);
kfree(trialmask);
bitmap_free(trialmask);
return 0;
err_invalid_mask:
kfree(trialmask);
bitmap_free(trialmask);
return -EINVAL;
}
@ -666,7 +664,7 @@ static void iio_free_scan_mask(struct iio_dev *indio_dev,
{
/* If the mask is dynamically allocated free it, otherwise do nothing */
if (!indio_dev->available_scan_masks)
kfree(mask);
bitmap_free(mask);
}
struct iio_device_config {
@ -736,8 +734,7 @@ static int iio_verify_update(struct iio_dev *indio_dev,
}
/* What scan mask do we actually have? */
compound_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
sizeof(long), GFP_KERNEL);
compound_mask = bitmap_zalloc(indio_dev->masklength, GFP_KERNEL);
if (compound_mask == NULL)
return -ENOMEM;
@ -762,7 +759,7 @@ static int iio_verify_update(struct iio_dev *indio_dev,
indio_dev->masklength,
compound_mask,
strict_scanmask);
kfree(compound_mask);
bitmap_free(compound_mask);
if (scan_mask == NULL)
return -EINVAL;
} else {
@ -1303,9 +1300,8 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
channels[i].scan_index;
}
if (indio_dev->masklength && buffer->scan_mask == NULL) {
buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength),
sizeof(*buffer->scan_mask),
GFP_KERNEL);
buffer->scan_mask = bitmap_zalloc(indio_dev->masklength,
GFP_KERNEL);
if (buffer->scan_mask == NULL) {
ret = -ENOMEM;
goto error_cleanup_dynamic;
@ -1334,7 +1330,7 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
return 0;
error_free_scan_mask:
kfree(buffer->scan_mask);
bitmap_free(buffer->scan_mask);
error_cleanup_dynamic:
iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list);
kfree(indio_dev->buffer->buffer_group.attrs);
@ -1347,7 +1343,7 @@ void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev)
if (!indio_dev->buffer)
return;
kfree(indio_dev->buffer->scan_mask);
bitmap_free(indio_dev->buffer->scan_mask);
kfree(indio_dev->buffer->buffer_group.attrs);
kfree(indio_dev->buffer->scan_el_group.attrs);
iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list);