diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index d3b375e63e0e..9f416e1bcb5c 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -268,8 +268,9 @@ static void dw_pcie_free_msi(struct pcie_port *pp) struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct device *dev = pci->dev; - dma_unmap_single_attrs(dev, pp->msi_data, sizeof(pp->msi_msg), - DMA_FROM_DEVICE, DMA_ATTR_SKIP_CPU_SYNC); + dma_unmap_page(dev, pp->msi_data, PAGE_SIZE, DMA_FROM_DEVICE); + if (pp->msi_page) + __free_page(pp->msi_page); } } @@ -377,13 +378,14 @@ int dw_pcie_host_init(struct pcie_port *pp) if (ret) dev_warn(pci->dev, "Failed to set DMA mask to 32-bit. Devices with only 32-bit MSI support may not work properly\n"); - pp->msi_data = dma_map_single_attrs(pci->dev, &pp->msi_msg, - sizeof(pp->msi_msg), - DMA_FROM_DEVICE, - DMA_ATTR_SKIP_CPU_SYNC); - ret = dma_mapping_error(pci->dev, pp->msi_data); + pp->msi_page = alloc_page(GFP_DMA32); + pp->msi_data = dma_map_page(dev, pp->msi_page, 0, + PAGE_SIZE, DMA_FROM_DEVICE); + ret = dma_mapping_error(dev, pp->msi_data); if (ret) { dev_err(pci->dev, "Failed to map MSI data\n"); + __free_page(pp->msi_page); + pp->msi_page = NULL; pp->msi_data = 0; goto err_free_msi; } diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 7d6e9b7576be..b5f528536358 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -190,8 +190,8 @@ struct pcie_port { int msi_irq; struct irq_domain *irq_domain; struct irq_domain *msi_domain; - u16 msi_msg; dma_addr_t msi_data; + struct page *msi_page; struct irq_chip *msi_irq_chip; u32 num_vectors; u32 irq_mask[MAX_MSI_CTRLS];