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-rw-r--r--kernel/power/disk.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index d79feeb4545..f5079231383 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -30,6 +30,22 @@ dev_t swsusp_resume_device;
sector_t swsusp_resume_block;
/**
+ * platform_prepare - prepare the machine for hibernation using the
+ * platform driver if so configured and return an error code if it fails
+ */
+
+static inline int platform_prepare(void)
+{
+ int error = 0;
+
+ if (pm_disk_mode == PM_DISK_PLATFORM) {
+ if (pm_ops && pm_ops->prepare)
+ error = pm_ops->prepare(PM_SUSPEND_DISK);
+ }
+ return error;
+}
+
+/**
* power_down - Shut machine down for hibernate.
* @mode: Suspend-to-disk mode
*
@@ -91,9 +107,15 @@ static int prepare_processes(void)
goto thaw;
}
+ error = platform_prepare();
+ if (error)
+ goto thaw;
+
/* Free memory before shutting down devices. */
if (!(error = swsusp_shrink_memory()))
return 0;
+
+ platform_finish();
thaw:
thaw_processes();
enable_cpus: