linux-kernel - [PATCH] PCI: amlogic: The check for devm_add_action_or

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Date:   Tue, 20 Dec 2022 12:21:37 +0300
From:   Aleksandr Burakov <a.burakov@...alinux.ru>
To:     Yue Wang <yue.wang@...ogic.com>,
        Hanjie Lin <hanjie.lin@...ogic.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Aleksandr Burakov <a.burakov@...alinux.ru>,
        linux-pci@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org, lvc-project@...uxtesting.org
Subject: [PATCH] PCI: amlogic: The check for devm_add_action_or_reset's return value added

The return value of the function devm_add_action_or_reset() was not
checked hence an error code would not be returned.

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

Fixes: 9c0ef6d34fdb ("PCI: amlogic: Add the Amlogic Meson PCIe controller driver")
Signed-off-by: Aleksandr Burakov <a.burakov@...alinux.ru>
---
 drivers/pci/controller/dwc/pci-meson.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
index c1527693bed9..3d82f0b65480 100644
--- a/drivers/pci/controller/dwc/pci-meson.c
+++ b/drivers/pci/controller/dwc/pci-meson.c
@@ -187,9 +187,13 @@ static inline struct clk *meson_pcie_probe_clock(struct device *dev,
 		return ERR_PTR(ret);
 	}
 
-	devm_add_action_or_reset(dev,
+	ret = devm_add_action_or_reset(dev,
 				 (void (*) (void *))clk_disable_unprepare,
 				 clk);
+	if (ret) {
+		dev_err(dev, "couldn't reset clk\n");
+		return ERR_PTR(ret);
+	}
 
 	return clk;
 }
-- 
2.25.1