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iio: buffer: Use dedicated variable in iio_buffers_alloc_sysfs_and_mask() 

Use dedicated variable for index in the loop in the
iio_buffers_alloc_sysfs_and_mask(). This will make code cleaner and
less error prone as proved by previous changes done in this function.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20211013094923.2473-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andy Shevchenko 2021-10-13 12:49:23 +03:00 committed by Jonathan Cameron
parent 7d71d289e1
commit e5cc9840f0
1 changed files with 8 additions and 12 deletions
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20
drivers/iio/industrialio-buffer.c
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@ -1727,8 +1727,7 @@ int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
const struct iio_chan_spec *channels;
struct iio_buffer *buffer;
int unwind_idx;
int ret, i;
int ret, i, idx;
size_t sz;
channels = indio_dev->channels;
@ -1743,15 +1742,12 @@ int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
if (!iio_dev_opaque->attached_buffers_cnt)
return 0;
for (i = 0; i < iio_dev_opaque->attached_buffers_cnt; i++) {
buffer = iio_dev_opaque->attached_buffers[i];
ret = __iio_buffer_alloc_sysfs_and_mask(buffer, indio_dev, i);
if (ret) {
unwind_idx = i - 1;
for (idx = 0; idx < iio_dev_opaque->attached_buffers_cnt; idx++) {
buffer = iio_dev_opaque->attached_buffers[idx];
ret = __iio_buffer_alloc_sysfs_and_mask(buffer, indio_dev, idx);
if (ret)
goto error_unwind_sysfs_and_mask;
}
}
unwind_idx = iio_dev_opaque->attached_buffers_cnt - 1;
sz = sizeof(*(iio_dev_opaque->buffer_ioctl_handler));
iio_dev_opaque->buffer_ioctl_handler = kzalloc(sz, GFP_KERNEL);
@ -1767,9 +1763,9 @@ int iio_buffers_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
return 0;
error_unwind_sysfs_and_mask:
for (; unwind_idx >= 0; unwind_idx--) {
buffer = iio_dev_opaque->attached_buffers[unwind_idx];
__iio_buffer_free_sysfs_and_mask(buffer, indio_dev, unwind_idx);
while (idx--) {
buffer = iio_dev_opaque->attached_buffers[idx];
__iio_buffer_free_sysfs_and_mask(buffer, indio_dev, idx);
}
return ret;
}