linux-kernel - [PATCH v2 1/5] PCI: dwc: Call dma_unmap

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Message-ID: <20200924190557.48fddba5@xhacker.debian>
Date:   Thu, 24 Sep 2020 19:05:57 +0800
From:   Jisheng Zhang <Jisheng.Zhang@...aptics.com>
To:     Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jingoo Han <jingoohan1@...il.com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Richard Zhu <hongxing.zhu@....com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Yue Wang <yue.wang@...ogic.com>,
        Kevin Hilman <khilman@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Jesper Nilsson <jesper.nilsson@...s.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Xiaowei Song <songxiaowei@...ilicon.com>,
        Binghui Wang <wangbinghui@...ilicon.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Stanimir Varbanov <svarbanov@...sol.com>,
        Pratyush Anand <pratyush.anand@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-omap@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-arm-kernel@...s.com,
        linux-arm-msm@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH v2 1/5] PCI: dwc: Call dma_unmap_page() before freeing the
 msi page

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

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.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