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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b70d3a2c59
Almost all implementations of pci_iomap() in the kernel, including the generic lib/iomap.c one, copies the content of a struct resource into unsigned long's which will break on 32 bits platforms with 64 bits resources. This fixes all definitions of pci_iomap() to use resource_size_t. I also "fixed" the 64bits arch for consistency. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
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* linux/arch/arm/mm/iomap.c
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*
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* Map IO port and PCI memory spaces so that {read,write}[bwl] can
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* be used to access this memory.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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#include <asm/io.h>
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#ifdef __io
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void __iomem *ioport_map(unsigned long port, unsigned int nr)
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{
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return __io(port);
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}
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EXPORT_SYMBOL(ioport_map);
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void ioport_unmap(void __iomem *addr)
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{
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}
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EXPORT_SYMBOL(ioport_unmap);
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#endif
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#ifdef CONFIG_PCI
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void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
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{
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resource_size_t start = pci_resource_start(dev, bar);
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resource_size_t len = pci_resource_len(dev, bar);
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unsigned long flags = pci_resource_flags(dev, bar);
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if (!len || !start)
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return NULL;
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if (maxlen && len > maxlen)
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len = maxlen;
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if (flags & IORESOURCE_IO)
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return ioport_map(start, len);
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if (flags & IORESOURCE_MEM) {
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if (flags & IORESOURCE_CACHEABLE)
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return ioremap(start, len);
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return ioremap_nocache(start, len);
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}
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return NULL;
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}
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EXPORT_SYMBOL(pci_iomap);
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void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
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{
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if ((unsigned long)addr >= VMALLOC_START &&
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(unsigned long)addr < VMALLOC_END)
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iounmap(addr);
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}
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EXPORT_SYMBOL(pci_iounmap);
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#endif
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