Commit 62729638 authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Greg Kroah-Hartman

PCI: dwc: Free MSI IRQ page in dw_pcie_free_msi()

[ Upstream commit dc69a3d5 ]

To avoid a memory leak, free the page allocated for MSI IRQ in
dw_pcie_free_msi().
Signed-off-by: default avatarJisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Acked-by: default avatarGustavo Pimentel <gustavo.pimentel@synopsys.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 2507c7c9
...@@ -303,20 +303,24 @@ void dw_pcie_free_msi(struct pcie_port *pp) ...@@ -303,20 +303,24 @@ void dw_pcie_free_msi(struct pcie_port *pp)
irq_domain_remove(pp->msi_domain); irq_domain_remove(pp->msi_domain);
irq_domain_remove(pp->irq_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) void dw_pcie_msi_init(struct pcie_port *pp)
{ {
struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct device *dev = pci->dev; struct device *dev = pci->dev;
struct page *page;
u64 msi_target; u64 msi_target;
page = alloc_page(GFP_KERNEL); pp->msi_page = alloc_page(GFP_KERNEL);
pp->msi_data = dma_map_page(dev, page, 0, PAGE_SIZE, DMA_FROM_DEVICE); pp->msi_data = dma_map_page(dev, pp->msi_page, 0, PAGE_SIZE,
DMA_FROM_DEVICE);
if (dma_mapping_error(dev, pp->msi_data)) { if (dma_mapping_error(dev, pp->msi_data)) {
dev_err(dev, "Failed to map MSI data\n"); dev_err(dev, "Failed to map MSI data\n");
__free_page(page); __free_page(pp->msi_page);
pp->msi_page = NULL;
return; return;
} }
msi_target = (u64)pp->msi_data; msi_target = (u64)pp->msi_data;
......
...@@ -179,6 +179,7 @@ struct pcie_port { ...@@ -179,6 +179,7 @@ struct pcie_port {
struct irq_domain *irq_domain; struct irq_domain *irq_domain;
struct irq_domain *msi_domain; struct irq_domain *msi_domain;
dma_addr_t msi_data; dma_addr_t msi_data;
struct page *msi_page;
u32 num_vectors; u32 num_vectors;
u32 irq_mask[MAX_MSI_CTRLS]; u32 irq_mask[MAX_MSI_CTRLS];
raw_spinlock_t lock; raw_spinlock_t lock;
......
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