linux-kernel - [PATCH v6 4/9] thermal: exynos: handle devm_regulator_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20231201095625.301884-5-m.majewski2@samsung.com>
Date:   Fri,  1 Dec 2023 10:56:20 +0100
From:   Mateusz Majewski <m.majewski2@...sung.com>
To:     linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Mateusz Majewski <m.majewski2@...sung.com>,
        Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Lukasz Luba <lukasz.luba@....com>,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: [PATCH v6 4/9] thermal: exynos: handle devm_regulator_get_optional
 return value correctly

Currently, if regulator is required in the SoC, but
devm_regulator_get_optional fails for whatever reason, the execution
will proceed without propagating the error. Meanwhile there is no reason
to output the error in case of -ENODEV.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: Mateusz Majewski <m.majewski2@...sung.com>
---
v3 -> v4: Moved info about not outputting error to the correct commit
  message.

 drivers/thermal/samsung/exynos_tmu.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index c144592d4584..8bcad8a70dc5 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -1002,9 +1002,17 @@ static int exynos_tmu_probe(struct platform_device *pdev)
 			return ret;
 		}
 	} else {
-		if (PTR_ERR(data->regulator) == -EPROBE_DEFER)
+		ret = PTR_ERR(data->regulator);
+		switch (ret) {
+		case -ENODEV:
+			break;
+		case -EPROBE_DEFER:
 			return -EPROBE_DEFER;
-		dev_info(&pdev->dev, "Regulator node (vtmu) not found\n");
+		default:
+			dev_err(&pdev->dev, "Failed to get regulator: %d\n",
+				ret);
+			return ret;
+		}
 	}
 
 	ret = exynos_map_dt_data(pdev);
-- 
2.42.0