From: Barry Song <baohua.song@xxxxxxx>
patch "PM: HIBERNATION: add resume_wait param to support MMC-like devices
as resume file" add resume_wait param. this patch adds resume_delay so that
resume_wait/delay has the same model with root_wait/delay.
Signed-off-by: Barry Song <baohua.song@xxxxxxx>
---
Documentation/kernel-parameters.txt | 3 +++
kernel/power/hibernate.c | 14 ++++++++++++++
2 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 88a7b19..831bde2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2240,6 +2240,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
in <PAGE_SIZE> units (needed only for swap files).
See Documentation/power/swsusp-and-swap-files.txt
+ resumedelay= [HIBERNATION] Delay (in seconds) to pause before attempting to
+ read the resume files
+
resumewait [HIBERNATION] Wait (indefinitely) for resume device to show up.
Useful for devices that are detected asynchronously
(e.g. USB and MMC devices).
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index b3da53c..f73a00e 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -33,6 +33,7 @@
static int nocompress = 0;
static int noresume = 0;
static int resume_wait = 0;
+static int resume_delay = 0;
static char resume_file[256] = CONFIG_PM_STD_PARTITION;
dev_t swsusp_resume_device;
sector_t swsusp_resume_block;
@@ -726,6 +727,12 @@ static int software_resume(void)
pr_debug("PM: Checking hibernation image partition %s\n", resume_file);
+ if (resume_delay) {
+ printk(KERN_INFO "Waiting %dsec before reading resume device...\n",
+ resume_delay);
+ ssleep(resume_delay);
+ }
+
/* Check if the device is there */
swsusp_resume_device = name_to_dev_t(resume_file);
if (!swsusp_resume_device) {
@@ -1075,8 +1082,15 @@ static int __init resumewait_setup(char *str)
return 1;
}
+static int __init resumedelay_setup(char *str)
+{
+ resume_delay = simple_strtoul(str, NULL, 0);
+ return 1;
+}
+
__setup("noresume", noresume_setup);
__setup("resume_offset=", resume_offset_setup);
__setup("resume=", resume_setup);
__setup("hibernate=", hibernate_setup);
__setup("resumewait", resumewait_setup);
+__setup("resumedelay=", resumedelay_setup);
--
1.7.1
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