PM / sleep: Enhance test_suspend option with repeat capability

Enhanced test_suspend boot paramter to repeat tests multiple times,
by adding optional repeat count. The new boot param syntax:
test_suspend="mem|freeze|standby[,N]"

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 22 insertions, 3 deletions

diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index 379f36de348a..084452e34a12 100644
--- a/kernel/power/suspend_test.c
+++ b/kernel/power/suspend_test.c
@@ -22,6 +22,8 @@
 #define TEST_SUSPEND_SECONDS    10
 
 static unsigned long suspend_test_start_time;
+static u32 test_repeat_count_max = 1;
+static u32 test_repeat_count_current;
 
 void suspend_test_start(void)
 {
@@ -74,6 +76,7 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state)
         int                     status;
 
         /* this may fail if the RTC hasn't been initialized */
+repeat:
         status = rtc_read_time(rtc, &alm.time);
         if (status < 0) {
                 printk(err_readtime, dev_name(&rtc->dev), status);
@@ -111,6 +114,10 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state)
         if (status < 0)
                 printk(err_suspend, status);
 
+        test_repeat_count_current++;
+        if (test_repeat_count_current < test_repeat_count_max)
+                goto repeat;
+
         /* Some platforms can't detect that the alarm triggered the
          * wakeup, or (accordingly) disable it after it afterwards.
          * It's supposed to give oneshot behavior; cope.
@@ -144,16 +151,28 @@ static char warn_bad_state[] __initdata =
 static int __init setup_test_suspend(char *value)
 {
         int i;
+        char *repeat;
+        char *suspend_type;
 
-        /* "=mem" ==> "mem" */
+        /* example : "=mem[,N]" ==> "mem[,N]" */
         value++;
+        suspend_type = strsep(&value, ",");
+        if (!suspend_type)
+                return 0;
+
+        repeat = strsep(&value, ",");
+        if (repeat) {
+                if (kstrtou32(repeat, 0, &test_repeat_count_max))
+                        return 0;
+        }
+
         for (i = 0; pm_labels[i]; i++)
-                if (!strcmp(pm_labels[i], value)) {
+                if (!strcmp(pm_labels[i], suspend_type)) {
                         test_state_label = pm_labels[i];
                         return 0;
                 }
 
-        printk(warn_bad_state, value);
+        printk(warn_bad_state, suspend_type);
         return 0;
 }
 __setup("test_suspend", setup_test_suspend);