2019-05-29 09:47:46

by Charles Keepax

Subject: [PATCH v2] extcon: arizona: Correct error handling on regmap_update_bits_check

Ensure the case when regmap_update_bits_check fails and the change
variable is not updated is handled correctly.

Signed-off-by: Charles Keepax <[email protected]>
---

Changes since v1:
- Print error message in driver remove

Thanks,
Charles

drivers/extcon/extcon-arizona.c | 33 ++++++++++++++++++++-------------
1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 9327479c719c2..519e89aedd4a0 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -335,10 +335,12 @@ static void arizona_start_mic(struct arizona_extcon_info *info)

arizona_extcon_pulse_micbias(info);

- regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
- ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
- &change);
- if (!change) {
+ ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
+ &change);
+ if (ret < 0) {
+ dev_err(arizona->dev, "Failed to enable micd: %d\n", ret);
+ } else if (!change) {
regulator_disable(info->micvdd);
pm_runtime_put_autosuspend(info->dev);
}
@@ -350,12 +352,14 @@ static void arizona_stop_mic(struct arizona_extcon_info *info)
const char *widget = arizona_extcon_get_micbias(info);
struct snd_soc_dapm_context *dapm = arizona->dapm;
struct snd_soc_component *component = snd_soc_dapm_to_component(dapm);
- bool change;
+ bool change = false;
int ret;

- regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
- ARIZONA_MICD_ENA, 0,
- &change);
+ ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, 0,
+ &change);
+ if (ret < 0)
+ dev_err(arizona->dev, "Failed to disable micd: %d\n", ret);

ret = snd_soc_component_disable_pin(component, widget);
if (ret != 0)
@@ -1727,12 +1731,15 @@ static int arizona_extcon_remove(struct platform_device *pdev)
struct arizona *arizona = info->arizona;
int jack_irq_rise, jack_irq_fall;
bool change;
+ int ret;

- regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
- ARIZONA_MICD_ENA, 0,
- &change);
-
- if (change) {
+ ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
+ ARIZONA_MICD_ENA, 0,
+ &change);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Failed to disable micd on remove: %d\n",
+ ret);
+ } else if (change) {
regulator_disable(info->micvdd);
pm_runtime_put(info->dev);
}
--
2.11.0

2019-05-30 01:05:20

by Chanwoo Choi

Subject: Re: [PATCH v2] extcon: arizona: Correct error handling on regmap_update_bits_check

Hi Charles,

On 19. 5. 29. 오후 6:46, Charles Keepax wrote:
> Ensure the case when regmap_update_bits_check fails and the change
> variable is not updated is handled correctly.
>
> Signed-off-by: Charles Keepax <[email protected]>
> ---
>
> Changes since v1:
> - Print error message in driver remove
>
> Thanks,
> Charles
>
> drivers/extcon/extcon-arizona.c | 33 ++++++++++++++++++++-------------
> 1 file changed, 20 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
> index 9327479c719c2..519e89aedd4a0 100644
> --- a/drivers/extcon/extcon-arizona.c
> +++ b/drivers/extcon/extcon-arizona.c
> @@ -335,10 +335,12 @@ static void arizona_start_mic(struct arizona_extcon_info *info)
>
> arizona_extcon_pulse_micbias(info);
>
> - regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
> - ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
> - &change);
> - if (!change) {
> + ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
> + ARIZONA_MICD_ENA, ARIZONA_MICD_ENA,
> + &change);
> + if (ret < 0) {
> + dev_err(arizona->dev, "Failed to enable micd: %d\n", ret);
> + } else if (!change) {
> regulator_disable(info->micvdd);
> pm_runtime_put_autosuspend(info->dev);
> }
> @@ -350,12 +352,14 @@ static void arizona_stop_mic(struct arizona_extcon_info *info)
> const char *widget = arizona_extcon_get_micbias(info);
> struct snd_soc_dapm_context *dapm = arizona->dapm;
> struct snd_soc_component *component = snd_soc_dapm_to_component(dapm);
> - bool change;
> + bool change = false;
> int ret;
>
> - regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
> - ARIZONA_MICD_ENA, 0,
> - &change);
> + ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
> + ARIZONA_MICD_ENA, 0,
> + &change);
> + if (ret < 0)
> + dev_err(arizona->dev, "Failed to disable micd: %d\n", ret);
>
> ret = snd_soc_component_disable_pin(component, widget);
> if (ret != 0)
> @@ -1727,12 +1731,15 @@ static int arizona_extcon_remove(struct platform_device *pdev)
> struct arizona *arizona = info->arizona;
> int jack_irq_rise, jack_irq_fall;
> bool change;
> + int ret;
>
> - regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
> - ARIZONA_MICD_ENA, 0,
> - &change);
> -
> - if (change) {
> + ret = regmap_update_bits_check(arizona->regmap, ARIZONA_MIC_DETECT_1,
> + ARIZONA_MICD_ENA, 0,
> + &change);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to disable micd on remove: %d\n",
> + ret);
> + } else if (change) {
> regulator_disable(info->micvdd);
> pm_runtime_put(info->dev);
> }
>

Applied it. Thanks.

--
Best Regards,
Chanwoo Choi
Samsung Electronics