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>

diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 3e7d9f6..16d291c 100644 (file)
--- 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;