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Date: Wed, 20 Mar 2019 17:00:30 +0900 From: Chanwoo Choi <cw00.choi@...sung.com> To: Kangjie Lu <kjlu@....edu> Cc: pakki001@....edu, MyungJoo Ham <myungjoo.ham@...sung.com>, Chen-Yu Tsai <wens@...e.org>, Hans de Goede <hdegoede@...hat.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH] extcon: fix a missing check of regmap_read 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@....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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