diff options
| author | Jakob Koschel <jakobkoschel@gmail.com> | 2022-04-01 01:06:30 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2022-04-04 09:11:25 +0100 |
| commit | c22e60c315c80ffeb33c7225cbeea33acf0a0f4b (patch) | |
| tree | bb41bff5b61c5baa3a522f4e064602ed15dc828a /drivers/iio/industrialio-buffer.c | |
| parent | a8e1f0ba138e0c7c51cdf268b2edef758581a31e (diff) | |
iio: buffer: remove usage of list iterator variable for list_for_each_entry_continue_reverse()
In preparation to limit the scope of the list iterator variable to the
list traversal loop, use a dedicated pointer to iterate through the
list [1].
Since that variable should not be used past the loop iteration, a
separate variable is used to 'remember the current location within the
loop'.
To either continue iterating from that position or start a new
iteration (if the previous iteration was complete) list_prepare_entry()
is used.
Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/ [1]
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220331230632.957634-1-jakobkoschel@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/industrialio-buffer.c')
| -rw-r--r-- | drivers/iio/industrialio-buffer.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c index 01369973329a..9d2c2d1d08fa 100644 --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -1059,7 +1059,7 @@ static int iio_enable_buffers(struct iio_dev *indio_dev, struct iio_device_config *config) { struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev); - struct iio_buffer *buffer; + struct iio_buffer *buffer, *tmp = NULL; int ret; indio_dev->active_scan_mask = config->scan_mask; @@ -1097,8 +1097,10 @@ static int iio_enable_buffers(struct iio_dev *indio_dev, list_for_each_entry(buffer, &iio_dev_opaque->buffer_list, buffer_list) { ret = iio_buffer_enable(buffer, indio_dev); - if (ret) + if (ret) { + tmp = buffer; goto err_disable_buffers; + } } if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) { @@ -1125,6 +1127,7 @@ err_detach_pollfunc: indio_dev->pollfunc); } err_disable_buffers: + buffer = list_prepare_entry(tmp, &iio_dev_opaque->buffer_list, buffer_list); list_for_each_entry_continue_reverse(buffer, &iio_dev_opaque->buffer_list, buffer_list) iio_buffer_disable(buffer, indio_dev); |