linux-kernel - [PATCH] iio: adc: qcom-pm8xxx-xoadc: Remove useless condition in pm8xxx_xoadc_parse

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Date:   Tue, 14 Mar 2023 22:37:09 +0300
From:   Kasumov Ruslan <xhxgldhlpfy@...il.com>
To:     Andy Gross <agross@...nel.org>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org,
        Kasumov Ruslan <s02210418@....cs.msu.ru>
Subject: [PATCH] iio: adc: qcom-pm8xxx-xoadc: Remove useless condition in pm8xxx_xoadc_parse_channel()

The left side of the loop condition never becomes false.
hwchan cannot be NULL, because it points to elements of the
hw_channels array that takes one of 4 predefined values:
pm8018_xoadc_channels, pm8038_xoadc_channels,
pm8058_xoadc_channels, pm8921_xoadc_channels.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 63c3ecd946d4 ("iio: adc: add a driver for Qualcomm PM8xxx HK/XOADC")
Signed-off-by: Kasumov Ruslan <s02210418@....cs.msu.ru>
---
 drivers/iio/adc/qcom-pm8xxx-xoadc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index eb424496ee1d..64a3aeb6261c 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -758,7 +758,7 @@ static int pm8xxx_xoadc_parse_channel(struct device *dev,
 	/* Find the right channel setting */
 	chid = 0;
 	hwchan = &hw_channels[0];
-	while (hwchan && hwchan->datasheet_name) {
+	while (hwchan->datasheet_name) {
 		if (hwchan->pre_scale_mux == pre_scale_mux &&
 		    hwchan->amux_channel == amux_channel)
 			break;
-- 
2.34.1