add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/kernel/power/hibernate.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * kernel/power/hibernate.c - Hibernation (a.k.a suspend-to-disk) support.
3
4
  *
..
..
@@ -6,15 +7,12 @@
6
7
  * Copyright (c) 2004 Pavel Machek <pavel@ucw.cz>
7
8
  * Copyright (c) 2009 Rafael J. Wysocki, Novell Inc.
8
9
  * Copyright (C) 2012 Bojan Smojver <bojan@rexursive.com>
9
- *
10
- * This file is released under the GPLv2.
11
10
  */
12
11
 
13
-#define pr_fmt(fmt) "PM: " fmt
12
+#define pr_fmt(fmt) "PM: hibernation: " fmt
14
13
 
15
14
 #include <linux/export.h>
16
15
 #include <linux/suspend.h>
17
-#include <linux/syscalls.h>
18
16
 #include <linux/reboot.h>
19
17
 #include <linux/string.h>
20
18
 #include <linux/device.h>
..
..
@@ -32,6 +30,7 @@
32
30
 #include <linux/ctype.h>
33
31
 #include <linux/genhd.h>
34
32
 #include <linux/ktime.h>
33
+#include <linux/security.h>
35
34
 #include <trace/events/power.h>
36
35
 
37
36
 #include "power.h"
..
..
@@ -68,9 +67,21 @@
68
67
 
69
68
 static const struct platform_hibernation_ops *hibernation_ops;
70
69
 
70
+static atomic_t hibernate_atomic = ATOMIC_INIT(1);
71
+
72
+bool hibernate_acquire(void)
73
+{
74
+	return atomic_add_unless(&hibernate_atomic, -1, 0);
75
+}
76
+
77
+void hibernate_release(void)
78
+{
79
+	atomic_inc(&hibernate_atomic);
80
+}
81
+
71
82
 bool hibernation_available(void)
72
83
 {
73
-	return (nohibernate == 0);
84
+	return nohibernate == 0 && !security_locked_down(LOCKDOWN_HIBERNATION);
74
85
 }
75
86
 
76
87
 /**
..
..
@@ -107,7 +118,7 @@
107
118
 #ifdef CONFIG_PM_DEBUG
108
119
 static void hibernation_debug_sleep(void)
109
120
 {
110
-	pr_info("hibernation debug: Waiting for 5 seconds.\n");
121
+	pr_info("debug: Waiting for 5 seconds.\n");
111
122
 	mdelay(5000);
112
123
 }
113
124
 
..
..
@@ -130,7 +141,7 @@
130
141
 static int platform_begin(int platform_mode)
131
142
 {
132
143
 	return (platform_mode && hibernation_ops) ?
133
-		hibernation_ops->begin() : 0;
144
+		hibernation_ops->begin(PMSG_FREEZE) : 0;
134
145
 }
135
146
 
136
147
 /**
..
..
@@ -278,7 +289,7 @@
278
289
 
279
290
 	error = dpm_suspend_end(PMSG_FREEZE);
280
291
 	if (error) {
281
-		pr_err("Some devices failed to power down, aborting hibernation\n");
292
+		pr_err("Some devices failed to power down, aborting\n");
282
293
 		return error;
283
294
 	}
284
295
 
..
..
@@ -286,7 +297,7 @@
286
297
 	if (error || hibernation_test(TEST_PLATFORM))
287
298
 		goto Platform_finish;
288
299
 
289
-	error = disable_nonboot_cpus();
300
+	error = suspend_disable_secondary_cpus();
290
301
 	if (error || hibernation_test(TEST_CPUS))
291
302
 		goto Enable_cpus;
292
303
 
..
..
@@ -296,7 +307,7 @@
296
307
 
297
308
 	error = syscore_suspend();
298
309
 	if (error) {
299
-		pr_err("Some system devices failed to power down, aborting hibernation\n");
310
+		pr_err("Some system devices failed to power down, aborting\n");
300
311
 		goto Enable_irqs;
301
312
 	}
302
313
 
..
..
@@ -311,11 +322,11 @@
311
322
 	restore_processor_state();
312
323
 	trace_suspend_resume(TPS("machine_suspend"), PM_EVENT_HIBERNATE, false);
313
324
 	if (error)
314
-		pr_err("Error %d creating hibernation image\n", error);
325
+		pr_err("Error %d creating image\n", error);
315
326
 
316
327
 	if (!in_suspend) {
317
328
 		events_check_enabled = false;
318
-		clear_free_pages();
329
+		clear_or_poison_free_pages();
319
330
 	}
320
331
 
321
332
 	platform_leave(platform_mode);
..
..
@@ -328,7 +339,7 @@
328
339
 	local_irq_enable();
329
340
 
330
341
  Enable_cpus:
331
-	enable_nonboot_cpus();
342
+	suspend_enable_secondary_cpus();
332
343
 
333
344
 	/* Allow architectures to do nosmt-specific post-resume dances */
334
345
 	if (!in_suspend)
..
..
@@ -426,7 +437,7 @@
426
437
 
427
438
 int __weak hibernate_resume_nonboot_cpu_disable(void)
428
439
 {
429
-	return disable_nonboot_cpus();
440
+	return suspend_disable_secondary_cpus();
430
441
 }
431
442
 
432
443
 /**
..
..
@@ -495,7 +506,7 @@
495
506
 	local_irq_enable();
496
507
 
497
508
  Enable_cpus:
498
-	enable_nonboot_cpus();
509
+	suspend_enable_secondary_cpus();
499
510
 
500
511
  Cleanup:
501
512
 	platform_restore_cleanup(platform_mode);
..
..
@@ -552,7 +563,7 @@
552
563
 	 * hibernation_ops->finish() before saving the image, so we should let
553
564
 	 * the firmware know that we're going to enter the sleep state after all
554
565
 	 */
555
-	error = hibernation_ops->begin();
566
+	error = hibernation_ops->begin(PMSG_HIBERNATE);
556
567
 	if (error)
557
568
 		goto Close;
558
569
 
..
..
@@ -573,7 +584,7 @@
573
584
 	if (error)
574
585
 		goto Platform_finish;
575
586
 
576
-	error = disable_nonboot_cpus();
587
+	error = suspend_disable_secondary_cpus();
577
588
 	if (error)
578
589
 		goto Enable_cpus;
579
590
 
..
..
@@ -595,7 +606,7 @@
595
606
 	local_irq_enable();
596
607
 
597
608
  Enable_cpus:
598
-	enable_nonboot_cpus();
609
+	suspend_enable_secondary_cpus();
599
610
 
600
611
  Platform_finish:
601
612
 	hibernation_ops->finish();
..
..
@@ -626,7 +637,7 @@
626
637
 	int error;
627
638
 
628
639
 	if (hibernation_mode == HIBERNATION_SUSPEND) {
629
-		error = suspend_devices_and_enter(PM_SUSPEND_MEM);
640
+		error = suspend_devices_and_enter(mem_sleep_current);
630
641
 		if (error) {
631
642
 			hibernation_mode = hibernation_ops ?
632
643
 						HIBERNATION_PLATFORM :
..
..
@@ -648,7 +659,7 @@
648
659
 		break;
649
660
 	case HIBERNATION_PLATFORM:
650
661
 		hibernation_platform_enter();
651
-		/* Fall through */
662
+		fallthrough;
652
663
 	case HIBERNATION_SHUTDOWN:
653
664
 		if (pm_power_off)
654
665
 			kernel_power_off();
..
..
@@ -679,9 +690,9 @@
679
690
 	error = swsusp_read(&flags);
680
691
 	swsusp_close(FMODE_READ | FMODE_EXCL);
681
692
 	if (!error)
682
-		hibernation_restore(flags & SF_PLATFORM_MODE);
693
+		error = hibernation_restore(flags & SF_PLATFORM_MODE);
683
694
 
684
-	pr_err("Failed to load hibernation image, recovering.\n");
695
+	pr_err("Failed to load image, recovering.\n");
685
696
 	swsusp_free();
686
697
 	free_basic_memory_bitmaps();
687
698
  Unlock:
..
..
@@ -695,8 +706,8 @@
695
706
  */
696
707
 int hibernate(void)
697
708
 {
698
-	int error, nr_calls = 0;
699
709
 	bool snapshot_test = false;
710
+	int error;
700
711
 
701
712
 	if (!hibernation_available()) {
702
713
 		pm_pr_dbg("Hibernation not available.\n");
..
..
@@ -705,22 +716,18 @@
705
716
 
706
717
 	lock_system_sleep();
707
718
 	/* The snapshot device should not be opened while we're running */
708
-	if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
719
+	if (!hibernate_acquire()) {
709
720
 		error = -EBUSY;
710
721
 		goto Unlock;
711
722
 	}
712
723
 
713
724
 	pr_info("hibernation entry\n");
714
725
 	pm_prepare_console();
715
-	error = __pm_notifier_call_chain(PM_HIBERNATION_PREPARE, -1, &nr_calls);
716
-	if (error) {
717
-		nr_calls--;
718
-		goto Exit;
719
-	}
726
+	error = pm_notifier_call_chain_robust(PM_HIBERNATION_PREPARE, PM_POST_HIBERNATION);
727
+	if (error)
728
+		goto Restore;
720
729
 
721
-	pr_info("Syncing filesystems ... \n");
722
-	ksys_sync();
723
-	pr_info("done.\n");
730
+	ksys_sync_helper();
724
731
 
725
732
 	error = freeze_processes();
726
733
 	if (error)
..
..
@@ -746,7 +753,7 @@
746
753
 		else
747
754
 		        flags |= SF_CRC32_MODE;
748
755
 
749
-		pm_pr_dbg("Writing image.\n");
756
+		pm_pr_dbg("Writing hibernation image.\n");
750
757
 		error = swsusp_write(flags);
751
758
 		swsusp_free();
752
759
 		if (!error) {
..
..
@@ -758,7 +765,7 @@
758
765
 		in_suspend = 0;
759
766
 		pm_restore_gfp_mask();
760
767
 	} else {
761
-		pm_pr_dbg("Image restored successfully.\n");
768
+		pm_pr_dbg("Hibernation image restored successfully.\n");
762
769
 	}
763
770
 
764
771
  Free_bitmaps:
..
..
@@ -776,9 +783,10 @@
776
783
 	/* Don't bother checking whether freezer_test_done is true */
777
784
 	freezer_test_done = false;
778
785
  Exit:
779
-	__pm_notifier_call_chain(PM_POST_HIBERNATION, nr_calls, NULL);
786
+	pm_notifier_call_chain(PM_POST_HIBERNATION);
787
+ Restore:
780
788
 	pm_restore_console();
781
-	atomic_inc(&snapshot_device_available);
789
+	hibernate_release();
782
790
  Unlock:
783
791
 	unlock_system_sleep();
784
792
 	pr_info("hibernation exit\n");
..
..
@@ -786,6 +794,102 @@
786
794
 	return error;
787
795
 }
788
796
 
797
+/**
798
+ * hibernate_quiet_exec - Execute a function with all devices frozen.
799
+ * @func: Function to execute.
800
+ * @data: Data pointer to pass to @func.
801
+ *
802
+ * Return the @func return value or an error code if it cannot be executed.
803
+ */
804
+int hibernate_quiet_exec(int (*func)(void *data), void *data)
805
+{
806
+	int error;
807
+
808
+	lock_system_sleep();
809
+
810
+	if (!hibernate_acquire()) {
811
+		error = -EBUSY;
812
+		goto unlock;
813
+	}
814
+
815
+	pm_prepare_console();
816
+
817
+	error = pm_notifier_call_chain_robust(PM_HIBERNATION_PREPARE, PM_POST_HIBERNATION);
818
+	if (error)
819
+		goto restore;
820
+
821
+	error = freeze_processes();
822
+	if (error)
823
+		goto exit;
824
+
825
+	lock_device_hotplug();
826
+
827
+	pm_suspend_clear_flags();
828
+
829
+	error = platform_begin(true);
830
+	if (error)
831
+		goto thaw;
832
+
833
+	error = freeze_kernel_threads();
834
+	if (error)
835
+		goto thaw;
836
+
837
+	error = dpm_prepare(PMSG_FREEZE);
838
+	if (error)
839
+		goto dpm_complete;
840
+
841
+	suspend_console();
842
+
843
+	error = dpm_suspend(PMSG_FREEZE);
844
+	if (error)
845
+		goto dpm_resume;
846
+
847
+	error = dpm_suspend_end(PMSG_FREEZE);
848
+	if (error)
849
+		goto dpm_resume;
850
+
851
+	error = platform_pre_snapshot(true);
852
+	if (error)
853
+		goto skip;
854
+
855
+	error = func(data);
856
+
857
+skip:
858
+	platform_finish(true);
859
+
860
+	dpm_resume_start(PMSG_THAW);
861
+
862
+dpm_resume:
863
+	dpm_resume(PMSG_THAW);
864
+
865
+	resume_console();
866
+
867
+dpm_complete:
868
+	dpm_complete(PMSG_THAW);
869
+
870
+	thaw_kernel_threads();
871
+
872
+thaw:
873
+	platform_end(true);
874
+
875
+	unlock_device_hotplug();
876
+
877
+	thaw_processes();
878
+
879
+exit:
880
+	pm_notifier_call_chain(PM_POST_HIBERNATION);
881
+
882
+restore:
883
+	pm_restore_console();
884
+
885
+	hibernate_release();
886
+
887
+unlock:
888
+	unlock_system_sleep();
889
+
890
+	return error;
891
+}
892
+EXPORT_SYMBOL_GPL(hibernate_quiet_exec);
789
893
 
790
894
 /**
791
895
  * software_resume - Resume from a saved hibernation image.
..
..
@@ -804,7 +908,7 @@
804
908
  */
805
909
 static int software_resume(void)
806
910
 {
807
-	int error, nr_calls = 0;
911
+	int error;
808
912
 
809
913
 	/*
810
914
 	 * If the user said "noresume".. bail out early.
..
..
@@ -872,7 +976,7 @@
872
976
 		goto Unlock;
873
977
 
874
978
 	/* The snapshot device should not be opened while we're running */
875
-	if (!atomic_add_unless(&snapshot_device_available, -1, 0)) {
979
+	if (!hibernate_acquire()) {
876
980
 		error = -EBUSY;
877
981
 		swsusp_close(FMODE_READ | FMODE_EXCL);
878
982
 		goto Unlock;
..
..
@@ -880,13 +984,11 @@
880
984
 
881
985
 	pr_info("resume from hibernation\n");
882
986
 	pm_prepare_console();
883
-	error = __pm_notifier_call_chain(PM_RESTORE_PREPARE, -1, &nr_calls);
884
-	if (error) {
885
-		nr_calls--;
886
-		goto Close_Finish;
887
-	}
987
+	error = pm_notifier_call_chain_robust(PM_RESTORE_PREPARE, PM_POST_RESTORE);
988
+	if (error)
989
+		goto Restore;
888
990
 
889
-	pm_pr_dbg("Preparing processes for restore.\n");
991
+	pm_pr_dbg("Preparing processes for hibernation restore.\n");
890
992
 	error = freeze_processes();
891
993
 	if (error)
892
994
 		goto Close_Finish;
..
..
@@ -900,10 +1002,11 @@
900
1002
 	error = load_image_and_restore();
901
1003
 	thaw_processes();
902
1004
  Finish:
903
-	__pm_notifier_call_chain(PM_POST_RESTORE, nr_calls, NULL);
1005
+	pm_notifier_call_chain(PM_POST_RESTORE);
1006
+ Restore:
904
1007
 	pm_restore_console();
905
-	pr_info("resume from hibernation failed (%d)\n", error);
906
-	atomic_inc(&snapshot_device_available);
1008
+	pr_info("resume failed (%d)\n", error);
1009
+	hibernate_release();
907
1010
 	/* For success case, the suspend path will release the lock */
908
1011
  Unlock:
909
1012
 	mutex_unlock(&system_transition_mutex);
..
..
@@ -1042,7 +1145,7 @@
1042
1145
 static ssize_t resume_show(struct kobject *kobj, struct kobj_attribute *attr,
1043
1146
 			   char *buf)
1044
1147
 {
1045
-	return sprintf(buf,"%d:%d\n", MAJOR(swsusp_resume_device),
1148
+	return sprintf(buf, "%d:%d\n", MAJOR(swsusp_resume_device),
1046
1149
 		       MINOR(swsusp_resume_device));
1047
1150
 }
1048
1151
 
..
..
@@ -1067,7 +1170,8 @@
1067
1170
 	lock_system_sleep();
1068
1171
 	swsusp_resume_device = res;
1069
1172
 	unlock_system_sleep();
1070
-	pm_pr_dbg("Configured resume from disk to %u\n", swsusp_resume_device);
1173
+	pm_pr_dbg("Configured hibernation resume from disk to %u\n",
1174
+		  swsusp_resume_device);
1071
1175
 	noresume = 0;
1072
1176
 	software_resume();
1073
1177
 	return n;
..
..
@@ -1141,7 +1245,7 @@
1141
1245
 
1142
1246
 power_attr(reserved_size);
1143
1247
 
1144
-static struct attribute * g[] = {
1248
+static struct attribute *g[] = {
1145
1249
 	&disk_attr.attr,
1146
1250
 	&resume_offset_attr.attr,
1147
1251
 	&resume_attr.attr,
..
..
@@ -1169,7 +1273,7 @@
1169
1273
 	if (noresume)
1170
1274
 		return 1;
1171
1275
 
1172
-	strncpy( resume_file, str, 255 );
1276
+	strncpy(resume_file, str, 255);
1173
1277
 	return 1;
1174
1278
 }
1175
1279
 
..
..
@@ -1219,7 +1323,7 @@
1219
1323
 	int rc = kstrtouint(str, 0, &resume_delay);
1220
1324
 
1221
1325
 	if (rc)
1222
-		return rc;
1326
+		pr_warn("resumedelay: bad option string '%s'\n", str);
1223
1327
 	return 1;
1224
1328
 }
1225
1329