From 2489007e7d740ccbc3e0a202914e243ad5178787 Mon Sep 17 00:00:00 2001
From: codeworkx <codeworkx@cyanogenmod.com>
Date: Sat, 22 Sep 2012 09:48:20 +0200
Subject: merge opensource jb u5

Change-Id: I1aaec157aa196f3448eff8636134fce89a814cf2
---
 kernel/power/hibernate.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 65 insertions(+), 1 deletion(-)

(limited to 'kernel/power/hibernate.c')

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 8884c27..c260280 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -14,6 +14,7 @@
 #include <linux/reboot.h>
 #include <linux/string.h>
 #include <linux/device.h>
+#include <linux/async.h>
 #include <linux/kmod.h>
 #include <linux/delay.h>
 #include <linux/fs.h>
@@ -24,13 +25,16 @@
 #include <linux/freezer.h>
 #include <linux/gfp.h>
 #include <linux/syscore_ops.h>
+#include <linux/ctype.h>
+#include <linux/genhd.h>
 #include <scsi/scsi_scan.h>
 
 #include "power.h"
 
 
 static int nocompress = 0;
-static int noresume = 0;
+int noresume;
+static int resume_wait = 0;
 static char resume_file[256] = CONFIG_PM_STD_PARTITION;
 dev_t swsusp_resume_device;
 sector_t swsusp_resume_block;
@@ -727,12 +731,30 @@ static int software_resume(void)
 
 	/* Check if the device is there */
 	swsusp_resume_device = name_to_dev_t(resume_file);
+
+	/*
+	 * name_to_dev_t is ineffective to verify parition if resume_file is in
+	 * integer format. (e.g. major:minor)
+	 */
+	if (isdigit(resume_file[0]) && resume_wait) {
+		int partno;
+		while (!get_gendisk(swsusp_resume_device, &partno))
+			msleep(10);
+	}
+
 	if (!swsusp_resume_device) {
 		/*
 		 * Some device discovery might still be in progress; we need
 		 * to wait for this to finish.
 		 */
 		wait_for_device_probe();
+
+		if (resume_wait) {
+			while ((swsusp_resume_device = name_to_dev_t(resume_file)) == 0)
+				msleep(10);
+			async_synchronize_full();
+		}
+
 		/*
 		 * We can't depend on SCSI devices being available after loading
 		 * one of their modules until scsi_complete_async_scans() is
@@ -810,7 +832,11 @@ close_finish:
 	goto Finish;
 }
 
+#ifdef CONFIG_FAST_RESUME
+resume_initcall(software_resume);
+#else
 late_initcall(software_resume);
+#endif
 
 
 static const char * const hibernation_modes[] = {
@@ -1002,11 +1028,42 @@ static ssize_t reserved_size_store(struct kobject *kobj,
 
 power_attr(reserved_size);
 
+#ifdef CONFIG_FAST_RESUME
+static ssize_t noresume_show(struct kobject *kobj,
+			struct kobj_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", noresume);
+}
+
+static ssize_t noresume_store(struct kobject *kobj,
+			struct kobj_attribute *attr, const char *buf, size_t n)
+{
+	if (sscanf(buf, "%d", &noresume) == 1) {
+		noresume = !!noresume;
+		if (noresume) {
+			if (!swsusp_resume_device)
+				swsusp_resume_device =
+						name_to_dev_t(resume_file);
+			swsusp_check();
+			swsusp_close(FMODE_READ);
+		}
+		return n;
+	}
+
+	return -EINVAL;
+}
+
+power_attr(noresume);
+#endif
+
 static struct attribute * g[] = {
 	&disk_attr.attr,
 	&resume_attr.attr,
 	&image_size_attr.attr,
 	&reserved_size_attr.attr,
+#ifdef CONFIG_FAST_RESUME
+	&noresume_attr.attr,
+#endif
 	NULL,
 };
 
@@ -1061,7 +1118,14 @@ static int __init noresume_setup(char *str)
 	return 1;
 }
 
+static int __init resumewait_setup(char *str)
+{
+	resume_wait = 1;
+	return 1;
+}
+
 __setup("noresume", noresume_setup);
 __setup("resume_offset=", resume_offset_setup);
 __setup("resume=", resume_setup);
 __setup("hibernate=", hibernate_setup);
+__setup("resumewait=", resumewait_setup);
-- 
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