On 2023/4/23 18:50, Jonathan Cameron wrote:
On Sun, 16 Apr 2023 19:47:45 -0700
Jiakai Luo <jkluo@xxxxxxxxxxx> wrote:
Smatch reports:
drivers/iio/adc/mxs-lradc-adc.c:766 mxs_lradc_adc_probe() warn:
missing unwind goto?
the order of three init operation:
1.mxs_lradc_adc_trigger_init
2.iio_triggered_buffer_setup
3.mxs_lradc_adc_hw_init
thus, the order of three cleanup operation should be:
1.mxs_lradc_adc_hw_stop
2.iio_triggered_buffer_cleanup
3.mxs_lradc_adc_trigger_remove
we exchange the order of two cleanup operations,
introducing the following differences:
1.if mxs_lradc_adc_trigger_init fails, returns directly;
2.if trigger_init succeeds but iio_triggered_buffer_setup fails,
goto err_trig and remove the trigger.
In addition, we also reorder the unwind that goes on in the
remove() callback to match the new ordering.
Fixes: 6dd112b9f85e ("iio: adc: mxs-lradc: Add support for ADC driver")
Signed-off-by: Jiakai Luo <jkluo@xxxxxxxxxxx>
Reviewed-by: Dongliang Mu <dzm91@xxxxxxxxxxx>
If resending please state why. I'm guessing on this occasion it was because
you realised a fresh thread is expected for a new patch.
Also, even if you are just amending the patch description, please increase
the version number so that we can be sure we are looking at latest version.
I already picked it from the earlier posting and this appears unchanged
so all's well that ends well!
Jonathan
Hi JC,
Jiakai originally would like to send a reminder about his patch, but
mistakenly sent a v2 version.
Please ignore this v2 version since this version is the same with v1
version.
Sorry for the mistake.
---
The issue is found by static analysis and remains untested.
---
drivers/iio/adc/mxs-lradc-adc.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index bca79a93cbe4..85882509b7d9 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -757,13 +757,13 @@ static int mxs_lradc_adc_probe(struct platform_device *pdev)
ret = mxs_lradc_adc_trigger_init(iio);
if (ret)
- goto err_trig;
+ return ret;
ret = iio_triggered_buffer_setup(iio, &iio_pollfunc_store_time,
&mxs_lradc_adc_trigger_handler,
&mxs_lradc_adc_buffer_ops);
if (ret)
- return ret;
+ goto err_trig;
adc->vref_mv = mxs_lradc_adc_vref_mv[lradc->soc];
@@ -801,9 +801,9 @@ static int mxs_lradc_adc_probe(struct platform_device *pdev)
err_dev:
mxs_lradc_adc_hw_stop(adc);
- mxs_lradc_adc_trigger_remove(iio);
-err_trig:
iio_triggered_buffer_cleanup(iio);
+err_trig:
+ mxs_lradc_adc_trigger_remove(iio);
return ret;
}
@@ -814,8 +814,8 @@ static int mxs_lradc_adc_remove(struct platform_device *pdev)
iio_device_unregister(iio);
mxs_lradc_adc_hw_stop(adc);
- mxs_lradc_adc_trigger_remove(iio);
iio_triggered_buffer_cleanup(iio);
+ mxs_lradc_adc_trigger_remove(iio);
return 0;
}
