linux-kernel - [PATCH 1/2] PCI: dra7xx: Fix link removal on probe error

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Message-Id: <20211214221450.589884-1-luca@lucaceresoli.net>
Date:   Tue, 14 Dec 2021 23:14:49 +0100
From:   Luca Ceresoli <luca@...aceresoli.net>
To:     linux-pci@...r.kernel.org
Cc:     Luca Ceresoli <luca@...aceresoli.net>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Sekhar Nori <nsekhar@...com>
Subject: [PATCH 1/2] PCI: dra7xx: Fix link removal on probe error

If a devm_phy_get() calls fails with phy_count==N (N > 0), then N links
have already been added by device_link_add() and won't be deleted by
device_link_del() because the code calls 'return' and not 'goto err_link'.

Fix in a very simple way by doing all the devm_phy_get() calls before all
the device_link_add() calls.

Fixes: 7a4db656a635 ("PCI: dra7xx: Create functional dependency between PCIe and PHY")
Signed-off-by: Luca Ceresoli <luca@...aceresoli.net>
---
 drivers/pci/controller/dwc/pci-dra7xx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index f7f1490e7beb..2ccc53869e13 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -757,7 +757,9 @@ static int dra7xx_pcie_probe(struct platform_device *pdev)
 		phy[i] = devm_phy_get(dev, name);
 		if (IS_ERR(phy[i]))
 			return PTR_ERR(phy[i]);
+	}
 
+	for (i = 0; i < phy_count; i++) {
 		link[i] = device_link_add(dev, &phy[i]->dev, DL_FLAG_STATELESS);
 		if (!link[i]) {
 			ret = -EINVAL;
-- 
2.25.1