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SubjectRe: [PATCH] extcon: fix a missing check of regmap_read
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Hi,

You better to edit the patch title as following
in order to sustain the title format for extcon:

extcon: fix a missing check of regmap_read
-> extcon: axp288: Fix a missing check of regmap_read


On 19. 3. 20. 오후 4:35, Kangjie Lu wrote:
> When regmap_read fails, it doesn't make sense to use the read
> value "val" because it can be uninitialized.
>
> The fix returns if regmap_read fails.
>
> Signed-off-by: Kangjie Lu <kjlu@umn.edu>
> ---
> drivers/extcon/extcon-axp288.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/extcon/extcon-axp288.c b/drivers/extcon/extcon-axp288.c
> index a983708b77a6..b2ba5f073aa7 100644
> --- a/drivers/extcon/extcon-axp288.c
> +++ b/drivers/extcon/extcon-axp288.c
> @@ -143,6 +143,10 @@ static void axp288_extcon_log_rsi(struct axp288_extcon_info *info)
> int ret;
>
> ret = regmap_read(info->regmap, AXP288_PS_BOOT_REASON_REG, &val);
> + if (ret) {
> + dev_err(info->dev, "failed to read BOOT_REASON_REG: %d\n", ret);
> + return;
> + }

Have to add the blank line. time.

And I think that axp288_extcon_log_rsi() have to return the 'error value'
instead of 'void' return type. And then should handle the return value
of axp288_extcon_log_rsi() within the axp288_extcon_probe().

For example,
ret = axp288_extcon_log_rsi(info)
if (ret < 0)
return ret;


> for (i = 0, rsi = axp288_pwr_up_down_info; *rsi; rsi++, i++) {
> if (val & BIT(i)) {
> dev_dbg(info->dev, "%s\n", *rsi);
>

--
Best Regards,
Chanwoo Choi
Samsung Electronics

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