add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/sound/firewire/isight.c
..
..
@@ -1,8 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
1
2
 /*
2
3
  * Apple iSight audio driver
3
4
  *
4
5
  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
5
- * Licensed under the terms of the GNU General Public License, version 2.
6
6
  */
7
7
 
8
8
 #include <asm/byteorder.h>
..
..
@@ -286,12 +286,6 @@
286
286
 			    struct snd_pcm_hw_params *hw_params)
287
287
 {
288
288
 	struct isight *isight = substream->private_data;
289
-	int err;
290
-
291
-	err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
292
-					       params_buffer_bytes(hw_params));
293
-	if (err < 0)
294
-		return err;
295
289
 
296
290
 	WRITE_ONCE(isight->pcm_active, true);
297
291
 
..
..
@@ -337,7 +331,7 @@
337
331
 	isight_stop_streaming(isight);
338
332
 	mutex_unlock(&isight->mutex);
339
333
 
340
-	return snd_pcm_lib_free_vmalloc_buffer(substream);
334
+	return 0;
341
335
 }
342
336
 
343
337
 static int isight_start_streaming(struct isight *isight)
..
..
@@ -447,13 +441,11 @@
447
441
 	static const struct snd_pcm_ops ops = {
448
442
 		.open      = isight_open,
449
443
 		.close     = isight_close,
450
-		.ioctl     = snd_pcm_lib_ioctl,
451
444
 		.hw_params = isight_hw_params,
452
445
 		.hw_free   = isight_hw_free,
453
446
 		.prepare   = isight_prepare,
454
447
 		.trigger   = isight_trigger,
455
448
 		.pointer   = isight_pointer,
456
-		.page      = snd_pcm_lib_get_vmalloc_page,
457
449
 	};
458
450
 	struct snd_pcm *pcm;
459
451
 	int err;
..
..
@@ -465,6 +457,7 @@
465
457
 	strcpy(pcm->name, "iSight");
466
458
 	isight->pcm = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
467
459
 	isight->pcm->ops = &ops;
460
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
468
461
 
469
462
 	return 0;
470
463
 }
..
..
@@ -602,8 +595,6 @@
602
595
 	struct isight *isight = card->private_data;
603
596
 
604
597
 	fw_iso_resources_destroy(&isight->resources);
605
-	fw_unit_put(isight->unit);
606
-	mutex_destroy(&isight->mutex);
607
598
 }
608
599
 
609
600
 static u64 get_unit_base(struct fw_unit *unit)
..
..
@@ -703,7 +694,11 @@
703
694
 	isight_stop_streaming(isight);
704
695
 	mutex_unlock(&isight->mutex);
705
696
 
706
-	snd_card_free_when_closed(isight->card);
697
+	// Block till all of ALSA character devices are released.
698
+	snd_card_free(isight->card);
699
+
700
+	mutex_destroy(&isight->mutex);
701
+	fw_unit_put(isight->unit);
707
702
 }
708
703
 
709
704
 static const struct ieee1394_device_id isight_id_table[] = {