---

yaml
---
r: 61541
b: refs/heads/master
c: a634cc1
h: refs/heads/master
i:
  61539: 64a81ed
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7777fab989b5d006903188c966058ebcd2d6342a
+refs/heads/master: a634cc10164d1c229fbeca33923e6a0ed939e894

trunk/drivers/acpi/sleep/main.c

@@ -217,10 +217,26 @@ static void acpi_hibernation_finish(void)
 	}
 }
 
+static int acpi_hibernation_pre_restore(void)
+{
+	acpi_status status;
+
+	status = acpi_hw_disable_all_gpes();
+
+	return ACPI_SUCCESS(status) ? 0 : -EFAULT;
+}
+
+static void acpi_hibernation_restore_cleanup(void)
+{
+	acpi_hw_enable_all_runtime_gpes();
+}
+
 static struct hibernation_ops acpi_hibernation_ops = {
 	.prepare = acpi_hibernation_prepare,
 	.enter = acpi_hibernation_enter,
 	.finish = acpi_hibernation_finish,
+	.pre_restore = acpi_hibernation_pre_restore,
+	.restore_cleanup = acpi_hibernation_restore_cleanup,
 };
 #endif				/* CONFIG_SOFTWARE_SUSPEND */
 

trunk/include/linux/suspend.h

@@ -43,11 +43,15 @@ static inline void pm_restore_console(void) {}
  * @prepare: prepare system for hibernation
  * @enter: shut down system after state has been saved to disk
  * @finish: finish/clean up after state has been reloaded
+ * @pre_restore: prepare system for the restoration from a hibernation image
+ * @restore_cleanup: clean up after a failing image restoration
  */
 struct hibernation_ops {
 	int (*prepare)(void);
 	int (*enter)(void);
 	void (*finish)(void);
+	int (*pre_restore)(void);
+	void (*restore_cleanup)(void);
 };
 
 #if defined(CONFIG_PM) && defined(CONFIG_SOFTWARE_SUSPEND)

trunk/kernel/power/disk.c

@@ -54,7 +54,8 @@ static struct hibernation_ops *hibernation_ops;
 
 void hibernation_set_ops(struct hibernation_ops *ops)
 {
-	if (ops && !(ops->prepare && ops->enter && ops->finish)) {
+	if (ops && !(ops->prepare && ops->enter && ops->finish
+	    && ops->pre_restore && ops->restore_cleanup)) {
 		WARN_ON(1);
 		return;
 	}
@@ -91,6 +92,31 @@ static void platform_finish(int platform_mode)
 		hibernation_ops->finish();
 }
 
+/**
+ *	platform_pre_restore - prepare the platform for the restoration from a
+ *	hibernation image.  If the restore fails after this function has been
+ *	called, platform_restore_cleanup() must be called.
+ */
+
+static int platform_pre_restore(int platform_mode)
+{
+	return (platform_mode && hibernation_ops) ?
+		hibernation_ops->pre_restore() : 0;
+}
+
+/**
+ *	platform_restore_cleanup - switch the platform to the normal mode of
+ *	operation after a failing restore.  If platform_pre_restore() has been
+ *	called before the failing restore, this function must be called too,
+ *	regardless of the result of platform_pre_restore().
+ */
+
+static void platform_restore_cleanup(int platform_mode)
+{
+	if (platform_mode && hibernation_ops)
+		hibernation_ops->restore_cleanup();
+}
+
 /**
  *	hibernation_snapshot - quiesce devices and create the hibernation
  *	snapshot image.
@@ -141,11 +167,13 @@ int hibernation_snapshot(int platform_mode)
 /**
  *	hibernation_restore - quiesce devices and restore the hibernation
  *	snapshot image.  If successful, control returns in hibernation_snaphot()
+ *	@platform_mode - if set, use the platform driver, if available, to
+ *			 prepare the platform frimware for the transition.
  *
  *	Must be called with pm_mutex held
  */
 
-int hibernation_restore(void)
+int hibernation_restore(int platform_mode)
 {
 	int error;
 
@@ -155,11 +183,14 @@ int hibernation_restore(void)
 	if (error)
 		goto Finish;
 
-	error = disable_nonboot_cpus();
-	if (!error)
-		error = swsusp_resume();
-
-	enable_nonboot_cpus();
+	error = platform_pre_restore(platform_mode);
+	if (!error) {
+		error = disable_nonboot_cpus();
+		if (!error)
+			error = swsusp_resume();
+		enable_nonboot_cpus();
+	}
+	platform_restore_cleanup(platform_mode);
  Finish:
 	device_resume();
 	resume_console();
@@ -260,8 +291,12 @@ int hibernate(void)
 	}
 	error = hibernation_snapshot(hibernation_mode == HIBERNATION_PLATFORM);
 	if (in_suspend && !error) {
+		unsigned int flags = 0;
+
+		if (hibernation_mode == HIBERNATION_PLATFORM)
+			flags |= SF_PLATFORM_MODE;
 		pr_debug("PM: writing image.\n");
-		error = swsusp_write();
+		error = swsusp_write(flags);
 		swsusp_free();
 		if (!error)
 			power_down();
@@ -295,6 +330,7 @@ int hibernate(void)
 static int software_resume(void)
 {
 	int error;
+	unsigned int flags;
 
 	mutex_lock(&pm_mutex);
 	if (!swsusp_resume_device) {
@@ -342,9 +378,9 @@ static int software_resume(void)
 
 	pr_debug("PM: Reading swsusp image.\n");
 
-	error = swsusp_read();
+	error = swsusp_read(&flags);
 	if (!error)
-		hibernation_restore();
+		hibernation_restore(flags & SF_PLATFORM_MODE);
 
 	printk(KERN_ERR "PM: Restore failed, recovering.\n");
 	swsusp_free();

trunk/kernel/power/power.h

@@ -27,7 +27,7 @@ struct swsusp_info {
 
 /* kernel/power/disk.c */
 extern int hibernation_snapshot(int platform_mode);
-extern int hibernation_restore(void);
+extern int hibernation_restore(int platform_mode);
 extern int hibernation_platform_enter(void);
 #endif
 
@@ -155,13 +155,20 @@ extern sector_t alloc_swapdev_block(int swap);
 extern void free_all_swap_pages(int swap);
 extern int swsusp_swap_in_use(void);
 
+/*
+ * Flags that can be passed from the hibernatig hernel to the "boot" kernel in
+ * the image header.
+ */
+#define SF_PLATFORM_MODE	1
+
+/* kernel/power/disk.c */
 extern int swsusp_check(void);
 extern int swsusp_shrink_memory(void);
 extern void swsusp_free(void);
 extern int swsusp_suspend(void);
 extern int swsusp_resume(void);
-extern int swsusp_read(void);
-extern int swsusp_write(void);
+extern int swsusp_read(unsigned int *flags_p);
+extern int swsusp_write(unsigned int flags);
 extern void swsusp_close(void);
 extern int suspend_enter(suspend_state_t state);
 

trunk/kernel/power/swap.c

@@ -33,8 +33,9 @@ extern char resume_file[];
 #define SWSUSP_SIG	"S1SUSPEND"
 
 struct swsusp_header {
-	char reserved[PAGE_SIZE - 20 - sizeof(sector_t)];
+	char reserved[PAGE_SIZE - 20 - sizeof(sector_t) - sizeof(int)];
 	sector_t image;
+	unsigned int flags;	/* Flags to pass to the "boot" kernel */
 	char	orig_sig[10];
 	char	sig[10];
 } __attribute__((packed));
@@ -138,7 +139,7 @@ static int wait_on_bio_chain(struct bio **bio_chain)
  * Saving part
  */
 
-static int mark_swapfiles(sector_t start)
+static int mark_swapfiles(sector_t start, unsigned int flags)
 {
 	int error;
 
@@ -148,6 +149,7 @@ static int mark_swapfiles(sector_t start)
 		memcpy(swsusp_header->orig_sig,swsusp_header->sig, 10);
 		memcpy(swsusp_header->sig,SWSUSP_SIG, 10);
 		swsusp_header->image = start;
+		swsusp_header->flags = flags;
 		error = bio_write_page(swsusp_resume_block,
 					swsusp_header, NULL);
 	} else {
@@ -369,14 +371,15 @@ static int enough_swap(unsigned int nr_pages)
 
 /**
  *	swsusp_write - Write entire image and metadata.
+ *	@flags: flags to pass to the "boot" kernel in the image header
  *
  *	It is important _NOT_ to umount filesystems at this point. We want
  *	them synced (in case something goes wrong) but we DO not want to mark
  *	filesystem clean: it is not. (And it does not matter, if we resume
  *	correctly, we'll mark system clean, anyway.)
  */
 
-int swsusp_write(void)
+int swsusp_write(unsigned int flags)
 {
 	struct swap_map_handle handle;
 	struct snapshot_handle snapshot;
@@ -415,7 +418,7 @@ int swsusp_write(void)
 		if (!error) {
 			flush_swap_writer(&handle);
 			printk("S");
-			error = mark_swapfiles(start);
+			error = mark_swapfiles(start, flags);
 			printk("|\n");
 		}
 	}
@@ -540,13 +543,20 @@ static int load_image(struct swap_map_handle *handle,
 	return error;
 }
 
-int swsusp_read(void)
+/**
+ *	swsusp_read - read the hibernation image.
+ *	@flags_p: flags passed by the "frozen" kernel in the image header should
+ *		  be written into this memeory location
+ */
+
+int swsusp_read(unsigned int *flags_p)
 {
 	int error;
 	struct swap_map_handle handle;
 	struct snapshot_handle snapshot;
 	struct swsusp_info *header;
 
+	*flags_p = swsusp_header->flags;
 	if (IS_ERR(resume_bdev)) {
 		pr_debug("swsusp: block device not initialised\n");
 		return PTR_ERR(resume_bdev);

trunk/kernel/power/user.c

@@ -188,7 +188,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
 			error = -EPERM;
 			break;
 		}
-		error = hibernation_restore();
+		error = hibernation_restore(data->platform_suspend);
 		break;
 
 	case SNAPSHOT_FREE: