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Also, reorder the cleanup labels and ensure all error paths properly unwind resources using gotos instead of direct returns, following the standard LIFO resource release order. Fixes: 67e17300dc1d ("iio: potentiostat: add LMP91000 support") Signed-off-by: Salah Triki --- drivers/iio/potentiostat/lmp91000.c | 34 ++++++++++++++--------------- 1 file changed, 16 insertions(+), 18 deletions(-) diff --git a/drivers/iio/potentiostat/lmp91000.c b/drivers/iio/potentiostat/lmp91000.c index eccc2a34358f..30b40b3a97d9 100644 --- a/drivers/iio/potentiostat/lmp91000.c +++ b/drivers/iio/potentiostat/lmp91000.c @@ -330,17 +330,27 @@ static int lmp91000_probe(struct i2c_client *client) if (ret) return ret; + data->cb_buffer = iio_channel_get_all_cb(dev, &lmp91000_buffer_cb, indio_dev); + if (IS_ERR(data->cb_buffer)) { + if (PTR_ERR(data->cb_buffer) == -ENODEV) + ret = -EPROBE_DEFER; + else + ret = PTR_ERR(data->cb_buffer); + + goto error_unreg_buffer; + } + ret = iio_trigger_set_immutable(iio_channel_cb_get_iio_dev(data->cb_buffer), data->trig); if (ret) { dev_err(dev, "cannot set immutable trigger.\n"); - return ret; + goto error_unreg_cb_buffer; } ret = iio_trigger_register(data->trig); if (ret) { dev_err(dev, "cannot register iio trigger.\n"); - return ret; + goto error_unreg_cb_buffer; } ret = iio_triggered_buffer_setup(indio_dev, NULL, @@ -349,35 +359,23 @@ static int lmp91000_probe(struct i2c_client *client) if (ret) goto error_unreg_trigger; - data->cb_buffer = iio_channel_get_all_cb(dev, &lmp91000_buffer_cb, - indio_dev); - - if (IS_ERR(data->cb_buffer)) { - if (PTR_ERR(data->cb_buffer) == -ENODEV) - ret = -EPROBE_DEFER; - else - ret = PTR_ERR(data->cb_buffer); - - goto error_unreg_buffer; - } - data->adc_chan = iio_channel_cb_get_channels(data->cb_buffer); ret = iio_device_register(indio_dev); if (ret) - goto error_unreg_cb_buffer; + goto error_unreg_trigger; return 0; +error_unreg_trigger: + iio_trigger_unregister(data->trig); + error_unreg_cb_buffer: iio_channel_release_all_cb(data->cb_buffer); error_unreg_buffer: iio_triggered_buffer_cleanup(indio_dev); -error_unreg_trigger: - iio_trigger_unregister(data->trig); - return ret; } -- 2.43.0