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From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Jingoo Han <jingoohan1@gmail.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>
Cc: "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v3 2/5] PCI: dwc: Free the page for MSI IRQ in dw_pcie_free_msi()
Date: Mon, 18 Mar 2019 09:54:35 +0000	[thread overview]
Message-ID: <20190318174711.4b7e556a@xhacker.debian> (raw)
In-Reply-To: <20190318174415.74fd25a5@xhacker.debian>

To avoid memory leak, we need to free the page for MSI in
dw_pcie_free_msi().

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 12 ++++++++----
 drivers/pci/controller/dwc/pcie-designware.h      |  1 +
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 1040939f45b4..a71b874ae3c0 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -305,20 +305,24 @@ 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)
+		__free_page(pp->msi_page);
 }
 
 void dw_pcie_msi_init(struct pcie_port *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct device *dev = pci->dev;
-	struct page *page;
 	u64 msi_target;
 
-	page = alloc_page(GFP_KERNEL);
-	pp->msi_data = dma_map_page(dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE);
+	pp->msi_page = alloc_page(GFP_KERNEL);
+	pp->msi_data = dma_map_page(dev, pp->msi_page, 0, PAGE_SIZE,
+				    DMA_FROM_DEVICE);
 	if (dma_mapping_error(dev, pp->msi_data)) {
 		dev_err(dev, "Failed to map MSI data\n");
-		__free_page(page);
+		__free_page(pp->msi_page);
+		pp->msi_page = NULL;
 		return;
 	}
 	msi_target = (u64)pp->msi_data;
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 377f4c0b52da..6fb0a1879932 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -179,6 +179,7 @@ struct pcie_port {
 	struct irq_domain	*irq_domain;
 	struct irq_domain	*msi_domain;
 	dma_addr_t		msi_data;
+	struct page		*msi_page;
 	u32			num_vectors;
 	u32			irq_mask[MAX_MSI_CTRLS];
 	raw_spinlock_t		lock;
-- 
2.20.1


WARNING: multiple messages have this Message-ID (diff)
From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To: Jingoo Han <jingoohan1@gmail.com>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>
Cc: "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v3 2/5] PCI: dwc: Free the page for MSI IRQ in dw_pcie_free_msi()
Date: Mon, 18 Mar 2019 09:54:35 +0000	[thread overview]
Message-ID: <20190318174711.4b7e556a@xhacker.debian> (raw)
In-Reply-To: <20190318174415.74fd25a5@xhacker.debian>

To avoid memory leak, we need to free the page for MSI in
dw_pcie_free_msi().

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 12 ++++++++----
 drivers/pci/controller/dwc/pcie-designware.h      |  1 +
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 1040939f45b4..a71b874ae3c0 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -305,20 +305,24 @@ 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)
+		__free_page(pp->msi_page);
 }
 
 void dw_pcie_msi_init(struct pcie_port *pp)
 {
 	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
 	struct device *dev = pci->dev;
-	struct page *page;
 	u64 msi_target;
 
-	page = alloc_page(GFP_KERNEL);
-	pp->msi_data = dma_map_page(dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE);
+	pp->msi_page = alloc_page(GFP_KERNEL);
+	pp->msi_data = dma_map_page(dev, pp->msi_page, 0, PAGE_SIZE,
+				    DMA_FROM_DEVICE);
 	if (dma_mapping_error(dev, pp->msi_data)) {
 		dev_err(dev, "Failed to map MSI data\n");
-		__free_page(page);
+		__free_page(pp->msi_page);
+		pp->msi_page = NULL;
 		return;
 	}
 	msi_target = (u64)pp->msi_data;
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 377f4c0b52da..6fb0a1879932 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -179,6 +179,7 @@ struct pcie_port {
 	struct irq_domain	*irq_domain;
 	struct irq_domain	*msi_domain;
 	dma_addr_t		msi_data;
+	struct page		*msi_page;
 	u32			num_vectors;
 	u32			irq_mask[MAX_MSI_CTRLS];
 	raw_spinlock_t		lock;
-- 
2.20.1


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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2019-03-18  9:54 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-18  9:53 [PATCH v3 0/5] PCI: dwc: Support remove Jisheng Zhang
2019-03-18  9:53 ` Jisheng Zhang
2019-03-18  9:53 ` [PATCH v3 1/5] PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid Jisheng Zhang
2019-03-18  9:53   ` Jisheng Zhang
2019-03-18  9:54 ` Jisheng Zhang [this message]
2019-03-18  9:54   ` [PATCH v3 2/5] PCI: dwc: Free the page for MSI IRQ in dw_pcie_free_msi() Jisheng Zhang
2019-03-18 10:03   ` Gustavo Pimentel
2019-03-18 10:03     ` Gustavo Pimentel
2019-03-18  9:55 ` PCI: dwc: Free MSI in the error code path of dw_pcie_host_init() Jisheng Zhang
2019-03-18 10:00   ` Jisheng Zhang
2019-03-18 10:00     ` Jisheng Zhang
2019-03-18  9:56 ` [PATCH v3 3/5] " Jisheng Zhang
2019-03-18  9:56   ` Jisheng Zhang
2019-03-28 17:08   ` Robin Murphy
2019-03-28 17:08     ` Robin Murphy
2019-03-29 12:00     ` Jisheng Zhang
2019-03-29 12:00       ` Jisheng Zhang
2019-03-18  9:57 ` [PATCH v3 4/5] PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify the code Jisheng Zhang
2019-03-18  9:57   ` Jisheng Zhang
2019-03-18  9:58 ` [PATCH v3 5/5] PCI: dwc: Save root bus for driver remove Jisheng Zhang
2019-03-18  9:58   ` Jisheng Zhang
2019-03-18 10:09   ` Gustavo Pimentel
2019-03-18 10:09     ` Gustavo Pimentel

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