linux-kernel - [PATCH V5 4/5] PCI: tegra: Check return value of tegra_pcie_init

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Message-ID: <20201203133451.17716-5-vidyas@nvidia.com>
Date:   Thu, 3 Dec 2020 19:04:50 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     <lorenzo.pieralisi@....com>, <robh+dt@...nel.org>,
        <bhelgaas@...gle.com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <amanharitsh123@...il.com>,
        <dinghao.liu@....edu.cn>, <kw@...ux.com>
CC:     <linux-pci@...r.kernel.org>, <linux-tegra@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>, <vidyas@...dia.com>, <sagar.tv@...il.com>
Subject: [PATCH V5 4/5] PCI: tegra: Check return value of tegra_pcie_init_controller()

The return value of tegra_pcie_init_controller() must be checked before
PCIe link up check and registering debugfs entries subsequently as it
doesn't make sense to do these when the controller initialization itself
has failed.

Tested-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Vidya Sagar <vidyas@...dia.com>
Acked-by: Thierry Reding <treding@...dia.com>
---
V5:
* Added Tested-by and Acked-by from Thierry Reding

V4:
* None

V3:
* New patch in this series

 drivers/pci/controller/dwc/pcie-tegra194.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 471c6d725c70..f4109d71f20b 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1563,7 +1563,11 @@ static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie)
 		goto fail_pm_get_sync;
 	}
 
-	tegra_pcie_init_controller(pcie);
+	ret = tegra_pcie_init_controller(pcie);
+	if (ret < 0) {
+		dev_err(dev, "Failed to initialize controller: %d\n", ret);
+		goto fail_pm_get_sync;
+	}
 
 	pcie->link_state = tegra_pcie_dw_link_up(&pcie->pci);
 	if (!pcie->link_state) {
-- 
2.17.1