This commit was manufactured by cvs2svn to create tag

[linux-2.6.git] / drivers / pci / hotplug / pciehprm_acpi.c

diff --git a/drivers/pci/hotplug/pciehprm_acpi.c b/drivers/pci/hotplug/pciehprm_acpi.c
index b127575..0728ab1 100644 (file)
--- a/drivers/pci/hotplug/pciehprm_acpi.c
+++ b/drivers/pci/hotplug/pciehprm_acpi.c
@@ -32,6 +32,7 @@
 #include <linux/init.h>
 #include <linux/acpi.h>
 #include <linux/efi.h>
+#include <linux/pci-acpi.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
 #ifdef CONFIG_IA64
@@ -126,6 +127,10 @@ static u8 * acpi_path_name( acpi_handle    handle)
 
 static void acpi_get__hpp ( struct acpi_bridge *ab);
 static void acpi_run_oshp ( struct acpi_bridge *ab);
+static int osc_exist = 0;
+static int oshp_exist = 0;
+static int run__osc_success = 0;
+static int run_oshp_success = 0;
 
 static int acpi_add_slot_to_php_slots(
        struct acpi_bridge      *ab,
@@ -158,8 +163,9 @@ static int acpi_add_slot_to_php_slots(
        ab->scanned += 1;
        if (!ab->_hpp)
                acpi_get__hpp(ab);
-
-       acpi_run_oshp(ab);
+       
+       if (!osc_exist)
+               acpi_run_oshp(ab);
 
        if (sun != samesun) {
                info("acpi_pciehprm:   Slot sun(%x) at s:b:d:f=0x%02x:%02x:%02x:%02x\n", 
@@ -248,8 +254,12 @@ static void acpi_run_oshp ( struct acpi_bridge     *ab)
        status = acpi_evaluate_object(ab->handle, METHOD_NAME_OSHP, NULL, &ret_buf);
        if (ACPI_FAILURE(status)) {
                err("acpi_pciehprm:%s OSHP fails=0x%x\n", path_name, status);
-       } else
+               oshp_exist = (status == 0x5) ? 0 : 1;
+       } else {
+               oshp_exist = 1;
+               run_oshp_success = 1;
                dbg("acpi_pciehprm:%s OSHP passes =0x%x\n", path_name, status);
+       }
        return;
 }
 
@@ -1056,6 +1066,16 @@ static struct acpi_bridge * add_host_bridge(
                kfree(ab);
                return NULL;
        }
+       status = pci_osc_control_set (OSC_PCI_EXPRESS_NATIVE_HP_CONTROL); 
+       if (ACPI_FAILURE(status)) {
+               dbg("%s: status %x\n", __FUNCTION__, status);
+        } else {
+               run__osc_success = 1;
+               osc_exist = 1;
+       }       
+       dbg("%s: status %x run__osc_success %x osc_exist %x \n", 
+               __FUNCTION__, status, run__osc_success, osc_exist);
+       
        build_a_bridge(ab, ab);
 
        return ab;
@@ -1141,6 +1161,23 @@ int pciehprm_init(enum php_ctlr_type ctlr_type)
        if (rc)
                return rc;
 
+       if (!osc_exist) {
+               if (!oshp_exist) {
+                       err("Both _OSC and OSHP methods do not exist\n");
+                       rc = -ENODEV;
+               } else if (!run_oshp_success) {
+                       err("Fails to run OSHP to gain control of native hot-plug\n");
+                       rc = -ENODEV;
+               }
+       } else if (!run__osc_success) {
+                       err("Fails to run _OSC to gain control of native hot-plug\n");
+                       rc = -ENODEV;
+       }
+       dbg("%s: run__osc_success %x osc_exist %x\n", __FUNCTION__,
+               run__osc_success, osc_exist);
+       dbg("%s: run_oshp_success %x oshp_exist %x", __FUNCTION__, 
+               run_oshp_success, oshp_exist);
+
        dbg("pciehprm ACPI init %s\n", (rc)?"fail":"success");
        return rc;
 }