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PCI: dwc: Fix setting error return on MSI DMA mapping failure 

When dma_mapping_error() returns error because of no enough memory,
but dw_pcie_host_init() returns success, which will mislead the callers.

Link: https://lore.kernel.org/r/30170911-0e2f-98ce-9266-70465b9073e5@huawei.com
Fixes: 07940c369a ("PCI: dwc: Fix MSI page leakage in suspend/resume")
Signed-off-by: Jianrong Zhang <zhangjianrong5@huawei.com>
Signed-off-by: Jiantao Zhang <water.zhangjiantao@huawei.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Jiantao Zhang 2022-03-09 20:01:04 +08:00 committed by Lorenzo Pieralisi
parent 3123109284
commit 88557685cd
1 changed files with 2 additions and 1 deletions
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3
drivers/pci/controller/dwc/pcie-designware-host.c
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@ -396,7 +396,8 @@ 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;