linux-kernel - [PATCH v2] PCI: dwc: fix error return code in dw_pcie_host

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Date:   Tue, 17 Nov 2020 14:41:42 +0800
From:   Wang Hai <wanghai38@...wei.com>
To:     <Jisheng.Zhang@...aptics.com>, <jingoohan1@...il.com>,
        <gustavo.pimentel@...opsys.com>, <lorenzo.pieralisi@....com>,
        <robh@...nel.org>, <bhelgaas@...gle.com>
CC:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] PCI: dwc: fix error return code in dw_pcie_host_init()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 07940c369a6b ("PCI: dwc: Fix MSI page leakage in suspend/resume")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Wang Hai <wanghai38@...wei.com>
---
v1->v2: just add 'ret = xxx'
 drivers/pci/controller/dwc/pcie-designware-host.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 44c2a6572199..42d8116a4a00 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -392,7 +392,8 @@ int dw_pcie_host_init(struct pcie_port *pp)
 						      sizeof(pp->msi_msg),
 						      DMA_FROM_DEVICE,
 						      DMA_ATTR_SKIP_CPU_SYNC);
-			if (dma_mapping_error(pci->dev, pp->msi_data)) {
+			ret = dma_mapping_error(pci->dev, pp->msi_data);
+			if (ret) {
 				dev_err(pci->dev, "Failed to map MSI data\n");
 				pp->msi_data = 0;
 				goto err_free_msi;
-- 
2.17.1