1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *  Do sleep inside a spin-lock
 4 *  Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 5 */
 6
 7#include <linux/export.h>
 8#include <sound/core.h>
 9#include "seq_lock.h"
10
 
 
11/* wait until all locks are released */
12void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line)
13{
14	int warn_count = 5 * HZ;
15
16	if (atomic_read(lockp) < 0) {
17		pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line);
18		return;
19	}
20	while (atomic_read(lockp) > 0) {
21		if (warn_count-- == 0)
22			pr_warn("ALSA: seq_lock: waiting [%d left] in %s:%d\n", atomic_read(lockp), file, line);
 
 
23		schedule_timeout_uninterruptible(1);
 
24	}
25}
 
26EXPORT_SYMBOL(snd_use_lock_sync_helper);

 
 1/*
 2 *  Do sleep inside a spin-lock
 3 *  Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
 4 *
 5 *
 6 *   This program is free software; you can redistribute it and/or modify
 7 *   it under the terms of the GNU General Public License as published by
 8 *   the Free Software Foundation; either version 2 of the License, or
 9 *   (at your option) any later version.
10 *
11 *   This program is distributed in the hope that it will be useful,
12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *   GNU General Public License for more details.
15 *
16 *   You should have received a copy of the GNU General Public License
17 *   along with this program; if not, write to the Free Software
18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19 *
20 */
21
22#include <linux/export.h>
23#include <sound/core.h>
24#include "seq_lock.h"
25
26#if defined(CONFIG_SMP) || defined(CONFIG_SND_DEBUG)
27
28/* wait until all locks are released */
29void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line)
30{
31	int max_count = 5 * HZ;
32
33	if (atomic_read(lockp) < 0) {
34		pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line);
35		return;
36	}
37	while (atomic_read(lockp) > 0) {
38		if (max_count == 0) {
39			pr_warn("ALSA: seq_lock: timeout [%d left] in %s:%d\n", atomic_read(lockp), file, line);
40			break;
41		}
42		schedule_timeout_uninterruptible(1);
43		max_count--;
44	}
45}
46
47EXPORT_SYMBOL(snd_use_lock_sync_helper);
48
49#endif