The SNAPSHOT_S2RAM ioctl used for implementing the feature allowing one to suspend to RAM after creating a hibernation image is currently broken, because it doesn't clear the "ready" flag in the struct snapshot_data object handled by it. As a result, the SNAPSHOT_UNFREEZE doesn't work correctly after SNAPSHOT_S2RAM has returned and the user space hibernate task cannot thaw the other processes as appropriate. Make SNAPSHOT_S2RAM clear data->ready to fix this problem.
Unified · Split
| @@ -381,6 +381,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd, · 380 unmodified lines | ||
| 381 | 381 | * PM_HIBERNATION_PREPARE |
| 382 | 382 | */ |
| 383 | 383 | error = suspend_devices_and_enter(PM_SUSPEND_MEM); |
| 384 | + data->ready = 0; | |
| 384 | 385 | break; |
| 385 | 386 | |
| 386 | 387 | case SNAPSHOT_PLATFORM_SUPPORT: |