[PATCH] arm64: PCI: fix memleak when calling pci_iomap/unmap()
From: Yang Yingliang <hidden>
Date: 2020-09-05 02:49:52
Also in:
linux-pci, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
config GENERIC_IOMAP is disabled on arm64, so pci_iounmap() does
nothing, when we using pci_iomap/pci_iounmap(), it will lead to
memory leak. Implements pci_iounmap() for arm64 to fix this leak.
Fixes: 09a5723983e3 ("arm64: Use include/asm-generic/io.h")
Signed-off-by: Yang Yingliang <redacted>
---
arch/arm64/include/asm/io.h | 5 +++++
arch/arm64/kernel/pci.c | 5 +++++
2 files changed, 10 insertions(+)
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index ff50dd731852d..4d8da06ac295f 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h@@ -18,6 +18,11 @@ #include <asm/alternative.h> #include <asm/cpufeature.h> +#ifdef CONFIG_PCI +struct pci_dev; +#define pci_iounmap pci_iounmap +extern void pci_iounmap(struct pci_dev *dev, void __iomem *addr); +#endif /* * Generic IO read/write. These perform native-endian accesses. */
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 1006ed2d7c604..ddfa1c53def48 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c@@ -217,4 +217,9 @@ void pcibios_remove_bus(struct pci_bus *bus) acpi_pci_remove_bus(bus); } +void pci_iounmap(struct pci_dev *dev, void __iomem *addr) +{ + iounmap(addr); +} +EXPORT_SYMBOL(pci_iounmap); #endif
--
2.25.1
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