From bdcfd44fb5b5fb8fd660e7f93f1095c507481024 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Sat, 16 Apr 2016 15:30:54 -0300 Subject: Linux-libre 4.5.1-gnu --- drivers/acpi/resource.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/resource.c') diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c index d02fd5304..56241eb34 100644 --- a/drivers/acpi/resource.c +++ b/drivers/acpi/resource.c @@ -27,8 +27,20 @@ #ifdef CONFIG_X86 #define valid_IRQ(i) (((i) != 0) && ((i) != 2)) +static inline bool acpi_iospace_resource_valid(struct resource *res) +{ + /* On X86 IO space is limited to the [0 - 64K] IO port range */ + return res->end < 0x10003; +} #else #define valid_IRQ(i) (true) +/* + * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical + * addresses mapping IO space in CPU physical address space, IO space + * resources can be placed anywhere in the 64-bit physical address space. + */ +static inline bool +acpi_iospace_resource_valid(struct resource *res) { return true; } #endif static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) @@ -127,7 +139,7 @@ static void acpi_dev_ioresource_flags(struct resource *res, u64 len, if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; - if (res->end >= 0x10003) + if (!acpi_iospace_resource_valid(res)) res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; if (io_decode == ACPI_DECODE_16) -- cgit v1.2.3-54-g00ecf