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authorThomas Gleixner <tglx@linutronix.de>2015-02-02 10:42:49 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-02-03 22:27:17 +0100
commit1d0420f1cfc4763a8c5bfc617e0a40f710c2f74d (patch)
tree33987b4e1bb1b0124241d8cba874d8246fd3eb4c /drivers/acpi/resource.c
parentc420dbd13ef7f399a865498496ac9ce2755b8007 (diff)
downloadlinux-1d0420f1cfc4763a8c5bfc617e0a40f710c2f74d.tar.bz2
ACPI: Use the length check for io resources as well
Also apply length check to IO resources. [Jiang] Remove enforcement that resource starting address must be non-zero. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/resource.c')
-rw-r--r--drivers/acpi/resource.c44
1 files changed, 19 insertions, 25 deletions
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 3e7d9f6eb875..16d291c60277 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -117,31 +117,30 @@ bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
}
EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
-static unsigned int acpi_dev_ioresource_flags(u64 start, u64 end, u8 io_decode,
- bool window)
+static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
+ u8 io_decode, bool window)
{
- int flags = IORESOURCE_IO;
+ res->flags = IORESOURCE_IO;
- if (io_decode == ACPI_DECODE_16)
- flags |= IORESOURCE_IO_16BIT_ADDR;
+ if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
+ res->flags |= IORESOURCE_DISABLED;
- if (start > end || end >= 0x10003)
- flags |= IORESOURCE_DISABLED;
+ if (res->end >= 0x10003)
+ res->flags |= IORESOURCE_DISABLED;
- if (window)
- flags |= IORESOURCE_WINDOW;
+ if (io_decode == ACPI_DECODE_16)
+ res->flags |= IORESOURCE_IO_16BIT_ADDR;
- return flags;
+ if (window)
+ res->flags |= IORESOURCE_WINDOW;
}
static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
u8 io_decode)
{
- u64 end = start + len - 1;
-
res->start = start;
- res->end = end;
- res->flags = acpi_dev_ioresource_flags(start, end, io_decode, false);
+ res->end = start + len - 1;
+ acpi_dev_ioresource_flags(res, len, io_decode, false);
}
/**
@@ -161,16 +160,12 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
switch (ares->type) {
case ACPI_RESOURCE_TYPE_IO:
io = &ares->data.io;
- if (!io->minimum && !io->address_length)
- return false;
acpi_dev_get_ioresource(res, io->minimum,
io->address_length,
io->io_decode);
break;
case ACPI_RESOURCE_TYPE_FIXED_IO:
fixed_io = &ares->data.fixed_io;
- if (!fixed_io->address && !fixed_io->address_length)
- return false;
acpi_dev_get_ioresource(res, fixed_io->address,
fixed_io->address_length,
ACPI_DECODE_10);
@@ -178,7 +173,8 @@ bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
default:
return false;
}
- return true;
+
+ return !(res->flags & IORESOURCE_DISABLED);
}
EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
@@ -216,9 +212,8 @@ bool acpi_dev_resource_address_space(struct acpi_resource *ares,
case ACPI_IO_RANGE:
io_decode = addr.address.granularity == 0xfff ?
ACPI_DECODE_10 : ACPI_DECODE_16;
- res->flags = acpi_dev_ioresource_flags(addr.address.minimum,
- addr.address.maximum,
- io_decode, window);
+ acpi_dev_ioresource_flags(res, addr.address.address_length,
+ io_decode, window);
break;
case ACPI_BUS_NUMBER_RANGE:
res->flags = IORESOURCE_BUS;
@@ -266,9 +261,8 @@ bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
case ACPI_IO_RANGE:
io_decode = ext_addr->address.granularity == 0xfff ?
ACPI_DECODE_10 : ACPI_DECODE_16;
- res->flags = acpi_dev_ioresource_flags(ext_addr->address.minimum,
- ext_addr->address.maximum,
- io_decode, window);
+ acpi_dev_ioresource_flags(res, ext_addr->address.address_length,
+ io_decode, window);
break;
case ACPI_BUS_NUMBER_RANGE:
res->flags = IORESOURCE_BUS;