Revert "clocksource: Load the ACPI PM clocksource asynchronously"

[cascardo/linux.git] / drivers / clocksource / acpi_pm.c

diff --git a/drivers/clocksource/acpi_pm.c b/drivers/clocksource/acpi_pm.c
index 82e8820..6b5cf02 100644 (file)
--- a/drivers/clocksource/acpi_pm.c
+++ b/drivers/clocksource/acpi_pm.c
@@ -23,7 +23,6 @@
 #include <linux/init.h>
 #include <linux/pci.h>
 #include <linux/delay.h>
-#include <linux/async.h>
 #include <asm/io.h>
 
 /*
@@ -180,15 +179,17 @@ static int verify_pmtmr_rate(void)
 /* Number of reads we try to get two different values */
 #define ACPI_PM_READ_CHECKS 10000
 
-static void __init acpi_pm_clocksource_async(void *unused, async_cookie_t cookie)
+static int __init init_acpi_pm_clocksource(void)
 {
        cycle_t value1, value2;
        unsigned int i, j = 0;
 
+       if (!pmtmr_ioport)
+               return -ENODEV;
 
        /* "verify" this timing source: */
        for (j = 0; j < ACPI_PM_MONOTONICITY_CHECKS; j++) {
-               usleep_range(100 * j, 100 * j + 100);
+               udelay(100 * j);
                value1 = clocksource_acpi_pm.read(&clocksource_acpi_pm);
                for (i = 0; i < ACPI_PM_READ_CHECKS; i++) {
                        value2 = clocksource_acpi_pm.read(&clocksource_acpi_pm);
@@ -202,34 +203,25 @@ static void __init acpi_pm_clocksource_async(void *unused, async_cookie_t cookie
                               " 0x%#llx, 0x%#llx - aborting.\n",
                               value1, value2);
                        pmtmr_ioport = 0;
-                       return;
+                       return -EINVAL;
                }
                if (i == ACPI_PM_READ_CHECKS) {
                        printk(KERN_INFO "PM-Timer failed consistency check "
                               " (0x%#llx) - aborting.\n", value1);
                        pmtmr_ioport = 0;
-                       return;
+                       return -ENODEV;
                }
        }
 
        if (verify_pmtmr_rate() != 0){
                pmtmr_ioport = 0;
-               return;
+               return -ENODEV;
        }
 
-       clocksource_register_hz(&clocksource_acpi_pm,
+       return clocksource_register_hz(&clocksource_acpi_pm,
                                                PMTMR_TICKS_PER_SEC);
 }
 
-static int __init init_acpi_pm_clocksource(void)
-{
-       if (!pmtmr_ioport)
-               return -ENODEV;
-
-       async_schedule(acpi_pm_clocksource_async, NULL);
-       return 0;
-}
-
 /* We use fs_initcall because we want the PCI fixups to have run
  * but we still need to load before device_initcall
  */