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@@ -27,8 +27,20 @@
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#ifdef CONFIG_X86
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#define valid_IRQ(i) (((i) != 0) && ((i) != 2))
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+static inline bool acpi_iospace_resource_valid(struct resource *res)
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+{
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+ /* On X86 IO space is limited to the [0 - 64K] IO port range */
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+ return res->end < 0x10003;
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+}
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#else
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#define valid_IRQ(i) (true)
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+/*
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+ * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical
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+ * addresses mapping IO space in CPU physical address space, IO space
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+ * resources can be placed anywhere in the 64-bit physical address space.
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+ */
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+static inline bool
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+acpi_iospace_resource_valid(struct resource *res) { return true; }
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#endif
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static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
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@@ -127,7 +139,7 @@ static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
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if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
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res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
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- if (res->end >= 0x10003)
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+ if (!acpi_iospace_resource_valid(res))
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res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
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if (io_decode == ACPI_DECODE_16)
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