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Subject[PATCH] PM / s2idle: Fix the failure of specifying "mem_sleep_default=" parameter
Date
On the arm64 platform, the psci driver is used by default to set the
suspend_ops structure; but the psci_acpi_init() function is called
before the command-line parameter "mem_sleep_default=" is specified;
the user cannot set the desired suspend mode through the
"mem_sleep_default=" parameter;

In mem_sleep_default_setup(), judge whether suspend_ops is set, if it
has been assigned, rewrite the value of mem_sleep_current variable; in
order to complete the user setting;

Signed-off-by: xiongxin <xiongxin@kylinos.cn>

diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index d8cae434f9eb..bef4b17de3f6 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -192,6 +192,21 @@ static int __init mem_sleep_default_setup(char *str)
break;
}

+ /*
+ * When the suspend_ops has been set, "mem_sleep_default=*" will
+ * be invalid, here to fix this situation.
+ */
+ if (suspend_ops) {
+ if (mem_sleep_default == PM_SUSPEND_TO_IDLE)
+ mem_sleep_current = PM_SUSPEND_TO_IDLE;
+ else if ((mem_sleep_default == PM_SUSPEND_STANDBY) &&
+ valid_state(PM_SUSPEND_STANDBY))
+ mem_sleep_current = PM_SUSPEND_STANDBY;
+ else if ((mem_sleep_default >= PM_SUSPEND_MEM) &&
+ valid_state(PM_SUSPEND_MEM))
+ mem_sleep_current = PM_SUSPEND_MEM;
+ }
+
return 1;
}
__setup("mem_sleep_default=", mem_sleep_default_setup);
--
2.25.1
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