[PATCH v2 2/5] PCI: dwc: Free the page for MSI IRQ in dw_pcie_free_msi()

[Jisheng Zhang]

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

Signed-off-by: Jisheng Zhang <jisheng.zh...@synaptics.com>
---
 drivers/pci/controller/dwc/pcie-designware-host.c | 3 +++
 drivers/pci/controller/dwc/pcie-designware.h      | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c 
b/drivers/pci/controller/dwc/pcie-designware-host.c
index a94d3530b694..abe3ff5f0867 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -305,6 +305,8 @@ void dw_pcie_free_msi(struct pcie_port *pp)
 
        irq_domain_remove(pp->msi_domain);
        irq_domain_remove(pp->irq_domain);
+
+       __free_page(pp->msi_page);
 }
 
 void dw_pcie_msi_init(struct pcie_port *pp)
@@ -322,6 +324,7 @@ void dw_pcie_msi_init(struct pcie_port *pp)
                return;
        }
        msi_target = (u64)pp->msi_data;
+       pp->msi_page = page;
 
        /* Program the msi_data */
        dw_pcie_wr_own_conf(pp, PCIE_MSI_ADDR_LO, 4,
diff --git a/drivers/pci/controller/dwc/pcie-designware.h 
b/drivers/pci/controller/dwc/pcie-designware.h
index f6fb65a40f10..3be7ca9f1fc3 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