[PATCH v1] PCI: brcmstb: fix error return paths in probe()

From: Jim Quinlan <james.quinlan@broadcom.com>
To: Dan Carpenter <dan.carpenter@oracle.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	bcm-kernel-feedback-list@broadcom.com,
	james.quinlan@broadcom.com
Cc: Rob Herring <robh@kernel.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Jim Quinlan <jquinlan@broadcom.com>,
	linux-rpi-kernel@lists.infradead.org (moderated list:BROADCOM
	BCM2711/BCM2835 ARM ARCHITECTURE),
	linux-arm-kernel@lists.infradead.org (moderated list:BROADCOM
	BCM2711/BCM2835 ARM ARCHITECTURE),
	linux-pci@vger.kernel.org (open list:PCI NATIVE HOST BRIDGE AND
	ENDPOINT DRIVERS), linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v1] PCI: brcmstb: fix error return paths in probe()
Date: Thu,  1 Oct 2020 11:18:21 -0400	[thread overview]
Message-ID: <20201001151821.27575-1-james.quinlan@broadcom.com> (raw)

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Fixes two cases where we were returning without calling
clk_disable_unprepare().  Although there is a common place to go on probe()
errors (the 'fail' label), one can only jump there after executing
brcm_pcie_setup(), so we have to add clk_disable_unprepare() calls to the
two error paths.

Fixes: b98f52bc6495 ("PCI: brcmstb: Add control of rescal reset")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>
---
 drivers/pci/controller/pcie-brcmstb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 6e7aa82a54a3..da2fefe80d47 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -1269,8 +1269,10 @@ static int brcm_pcie_probe(struct platform_device *pdev)
 		return ret;
 	}
 	pcie->rescal = devm_reset_control_get_optional_shared(&pdev->dev, "rescal");
-	if (IS_ERR(pcie->rescal))
+	if (IS_ERR(pcie->rescal)) {
+		clk_disable_unprepare(pcie->clk);
 		return PTR_ERR(pcie->rescal);
+	}
 
 	ret = reset_control_deassert(pcie->rescal);
 	if (ret)
@@ -1279,6 +1281,7 @@ static int brcm_pcie_probe(struct platform_device *pdev)
 	ret = brcm_phy_start(pcie);
 	if (ret) {
 		reset_control_assert(pcie->rescal);
+		clk_disable_unprepare(pcie->clk);
 		return ret;
 	}
 
-- 
2.17.1


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