ACPI: request correct fixed hardware resource type (MMIO vs I/O port)

ACPI supports fixed hardware (PM_TMR, GPE blocks, etc) in either I/O port
or MMIO space, but used to always request the regions from I/O space
because it didn't check the address_space_id.

Sample ACPI fixed hardware in MMIO space (HP rx2600), was incorrectly
reported in /proc/ioports, now reported in /proc/iomem:

    ff5c1004-ff5c1007 : PM_TMR
    ff5c1008-ff5c100b : PM1a_EVT_BLK
    ff5c100c-ff5c100d : PM1a_CNT_BLK
    ff5c1010-ff5c1013 : GPE0_BLK
    ff5c1014-ff5c1017 : GPE1_BLK

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 23 insertions, 18 deletions

diff --git a/drivers/acpi/motherboard.c b/drivers/acpi/motherboard.c
index 468244147ec1..14ffe68a094e 100644
--- a/drivers/acpi/motherboard.c
+++ b/drivers/acpi/motherboard.c
@@ -123,41 +123,46 @@ static struct acpi_driver acpi_motherboard_driver2 = {
                 },
 };
 
+static void __init acpi_request_region (struct acpi_generic_address *addr,
+        unsigned int length, char *desc)
+{
+        if (!addr->address || !length)
+                return;
+
+        if (addr->address_space_id == ACPI_ADR_SPACE_SYSTEM_IO)
+                request_region(addr->address, length, desc);
+        else if (addr->address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
+                request_mem_region(addr->address, length, desc);
+}
+
 static void __init acpi_reserve_resources(void)
 {
-        if (acpi_gbl_FADT->xpm1a_evt_blk.address && acpi_gbl_FADT->pm1_evt_len)
-                request_region(acpi_gbl_FADT->xpm1a_evt_blk.address,
+        acpi_request_region(&acpi_gbl_FADT->xpm1a_evt_blk,
                                acpi_gbl_FADT->pm1_evt_len, "PM1a_EVT_BLK");
 
-        if (acpi_gbl_FADT->xpm1b_evt_blk.address && acpi_gbl_FADT->pm1_evt_len)
-                request_region(acpi_gbl_FADT->xpm1b_evt_blk.address,
+        acpi_request_region(&acpi_gbl_FADT->xpm1b_evt_blk,
                                acpi_gbl_FADT->pm1_evt_len, "PM1b_EVT_BLK");
 
-        if (acpi_gbl_FADT->xpm1a_cnt_blk.address && acpi_gbl_FADT->pm1_cnt_len)
-                request_region(acpi_gbl_FADT->xpm1a_cnt_blk.address,
+        acpi_request_region(&acpi_gbl_FADT->xpm1a_cnt_blk,
                                acpi_gbl_FADT->pm1_cnt_len, "PM1a_CNT_BLK");
 
-        if (acpi_gbl_FADT->xpm1b_cnt_blk.address && acpi_gbl_FADT->pm1_cnt_len)
-                request_region(acpi_gbl_FADT->xpm1b_cnt_blk.address,
+        acpi_request_region(&acpi_gbl_FADT->xpm1b_cnt_blk,
                                acpi_gbl_FADT->pm1_cnt_len, "PM1b_CNT_BLK");
 
-        if (acpi_gbl_FADT->xpm_tmr_blk.address && acpi_gbl_FADT->pm_tm_len == 4)
-                request_region(acpi_gbl_FADT->xpm_tmr_blk.address, 4, "PM_TMR");
+        if (acpi_gbl_FADT->pm_tm_len == 4)
+                acpi_request_region(&acpi_gbl_FADT->xpm_tmr_blk, 4, "PM_TMR");
 
-        if (acpi_gbl_FADT->xpm2_cnt_blk.address && acpi_gbl_FADT->pm2_cnt_len)
-                request_region(acpi_gbl_FADT->xpm2_cnt_blk.address,
+        acpi_request_region(&acpi_gbl_FADT->xpm2_cnt_blk,
                                acpi_gbl_FADT->pm2_cnt_len, "PM2_CNT_BLK");
 
         /* Length of GPE blocks must be a non-negative multiple of 2 */
 
-        if (acpi_gbl_FADT->xgpe0_blk.address && acpi_gbl_FADT->gpe0_blk_len &&
-            !(acpi_gbl_FADT->gpe0_blk_len & 0x1))
-                request_region(acpi_gbl_FADT->xgpe0_blk.address,
+        if (!(acpi_gbl_FADT->gpe0_blk_len & 0x1))
+                acpi_request_region(&acpi_gbl_FADT->xgpe0_blk,
                                acpi_gbl_FADT->gpe0_blk_len, "GPE0_BLK");
 
-        if (acpi_gbl_FADT->xgpe1_blk.address && acpi_gbl_FADT->gpe1_blk_len &&
-            !(acpi_gbl_FADT->gpe1_blk_len & 0x1))
-                request_region(acpi_gbl_FADT->xgpe1_blk.address,
+        if (!(acpi_gbl_FADT->gpe1_blk_len & 0x1))
+                acpi_request_region(&acpi_gbl_FADT->xgpe1_blk,
                                acpi_gbl_FADT->gpe1_blk_len, "GPE1_BLK");
 }