mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-12 01:14:22 -05:00
80 lines
2.9 KiB
Diff
80 lines
2.9 KiB
Diff
|
From 30a4f0783d2978e27a8b8856d8e358ccaf5ddab4 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Walter Yang <yandongy@codeaurora.org>
|
||
|
|
Date: Thu, 13 Oct 2016 10:48:39 +0800
|
||
|
|
Subject: ASoC: msm: lock read/write when add/free audio ion memory
|
||
|
|
|
||
|
|
As read/write get access to ion memory region as well, it's
|
||
|
|
necessary to lock them when ion memory is about to be added/freed
|
||
|
|
to avoid racing cases.
|
||
|
|
|
||
|
|
CRs-Fixed: 1071809
|
||
|
|
Change-Id: I436ead23c93384961b38ca99b9312a40c50ad03a
|
||
|
|
Signed-off-by: Walter Yang <yandongy@codeaurora.org>
|
||
|
|
---
|
||
|
|
arch/arm/mach-msm/qdsp6v2/audio_utils_aio.c | 20 +++++++++++++++++---
|
||
|
|
1 file changed, 17 insertions(+), 3 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/arch/arm/mach-msm/qdsp6v2/audio_utils_aio.c b/arch/arm/mach-msm/qdsp6v2/audio_utils_aio.c
|
||
|
|
index 5bdd10a..4455368 100644
|
||
|
|
--- a/arch/arm/mach-msm/qdsp6v2/audio_utils_aio.c
|
||
|
|
+++ b/arch/arm/mach-msm/qdsp6v2/audio_utils_aio.c
|
||
|
|
@@ -1,6 +1,6 @@
|
||
|
|
/* Copyright (C) 2008 Google, Inc.
|
||
|
|
* Copyright (C) 2008 HTC Corporation
|
||
|
|
- * Copyright (c) 2009-2013, The Linux Foundation. All rights reserved.
|
||
|
|
+ * Copyright (c) 2009-2013,2016 The Linux Foundation. All rights reserved.
|
||
|
|
*
|
||
|
|
* This software is licensed under the terms of the GNU General Public
|
||
|
|
* License version 2, as published by the Free Software Foundation, and
|
||
|
|
@@ -562,6 +562,8 @@ int audio_aio_release(struct inode *inode, struct file *file)
|
||
|
|
struct q6audio_aio *audio = file->private_data;
|
||
|
|
pr_debug("%s[%p]\n", __func__, audio);
|
||
|
|
mutex_lock(&audio->lock);
|
||
|
|
+ mutex_lock(&audio->read_lock);
|
||
|
|
+ mutex_lock(&audio->write_lock);
|
||
|
|
audio->wflush = 1;
|
||
|
|
if (audio->enabled)
|
||
|
|
audio_aio_flush(audio);
|
||
|
|
@@ -577,6 +579,8 @@ int audio_aio_release(struct inode *inode, struct file *file)
|
||
|
|
audio_aio_reset_event_queue(audio);
|
||
|
|
q6asm_audio_client_free(audio->ac);
|
||
|
|
mutex_unlock(&audio->lock);
|
||
|
|
+ mutex_unlock(&audio->write_lock);
|
||
|
|
+ mutex_unlock(&audio->read_lock);
|
||
|
|
mutex_destroy(&audio->lock);
|
||
|
|
mutex_destroy(&audio->read_lock);
|
||
|
|
mutex_destroy(&audio->write_lock);
|
||
|
|
@@ -1349,8 +1353,13 @@ long audio_aio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||
|
|
mutex_lock(&audio->lock);
|
||
|
|
if (copy_from_user(&info, (void *)arg, sizeof(info)))
|
||
|
|
rc = -EFAULT;
|
||
|
|
- else
|
||
|
|
+ else{
|
||
|
|
+ mutex_lock(&audio->read_lock);
|
||
|
|
+ mutex_lock(&audio->write_lock);
|
||
|
|
rc = audio_aio_ion_add(audio, &info);
|
||
|
|
+ mutex_unlock(&audio->write_lock);
|
||
|
|
+ mutex_unlock(&audio->read_lock);
|
||
|
|
+ }
|
||
|
|
mutex_unlock(&audio->lock);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
@@ -1360,8 +1369,13 @@ long audio_aio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
||
|
|
pr_debug("%s[%p]:AUDIO_DEREGISTER_ION\n", __func__, audio);
|
||
|
|
if (copy_from_user(&info, (void *)arg, sizeof(info)))
|
||
|
|
rc = -EFAULT;
|
||
|
|
- else
|
||
|
|
+ else{
|
||
|
|
+ mutex_lock(&audio->read_lock);
|
||
|
|
+ mutex_lock(&audio->write_lock);
|
||
|
|
rc = audio_aio_ion_remove(audio, &info);
|
||
|
|
+ mutex_unlock(&audio->write_lock);
|
||
|
|
+ mutex_unlock(&audio->read_lock);
|
||
|
|
+ }
|
||
|
|
mutex_unlock(&audio->lock);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
--
|
||
|
|
cgit v1.1
|
||
|
|
|