megaraid_sas: Move poll_aen_lock initializer

[pandora-kernel.git] / kernel / power / user.c

diff --git a/kernel/power/user.c b/kernel/power/user.c
index 6d8f535..f08d227 100644 (file)
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -283,10 +283,17 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
                }
                pm_restore_gfp_mask();
                error = hibernation_snapshot(data->platform_support);
-               if (!error)
+               if (error) {
+                       thaw_kernel_threads();
+               } else {
                        error = put_user(in_suspend, (int __user *)arg);
-               if (!error)
-                       data->ready = 1;
+                       if (!error && !freezer_test_done)
+                               data->ready = 1;
+                       if (freezer_test_done) {
+                               freezer_test_done = false;
+                               thaw_kernel_threads();
+                       }
+               }
                break;
 
        case SNAPSHOT_ATOMIC_RESTORE:
@@ -303,6 +310,15 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
                swsusp_free();
                memset(&data->handle, 0, sizeof(struct snapshot_handle));
                data->ready = 0;
+               /*
+                * It is necessary to thaw kernel threads here, because
+                * SNAPSHOT_CREATE_IMAGE may be invoked directly after
+                * SNAPSHOT_FREE.  In that case, if kernel threads were not
+                * thawed, the preallocation of memory carried out by
+                * hibernation_snapshot() might run into problems (i.e. it
+                * might fail or even deadlock).
+                */
+               thaw_kernel_threads();
                break;
 
        case SNAPSHOT_SET_IMAGE_SIZE: