[PATCH v2 1/5] PCI: dwc: Call dma_unmap_page() before freeing the msi page

Jisheng Zhang
2020-09-24T11:10:10Z

In dw_pcie_free_msi(), call dma_unmap_page() before freeing.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
drivers/pci/controller/dwc/pcie-designware-host.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 9dafecba347f..0a19de946351 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -288,8 +288,12 @@ void dw_pcie_free_msi(struct pcie_port *pp)
irq_domain_remove(pp->msi_domain);
irq_domain_remove(pp->irq_domain);

- if (pp->msi_page)
+ if (pp->msi_page) {
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct device *dev = pci->dev;
+ dma_unmap_page(dev, pp->msi_data, PAGE_SIZE, DMA_FROM_DEVICE);
__free_page(pp->msi_page);
+ }
}

void dw_pcie_msi_init(struct pcie_port *pp)
--
2.28.0