mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-12 01:14:22 -05:00
98 lines
3.4 KiB
Diff
98 lines
3.4 KiB
Diff
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From 62580295210b6c0bd809cde7088b45ebb65ace79 Mon Sep 17 00:00:00 2001
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From: Walter Yang <yandongy@codeaurora.org>
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Date: Wed, 28 Sep 2016 20:11:23 +0800
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Subject: ASoC: msm: lock read/write when add/free audio ion memory
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As read/write get access to ion memory region as well, it's
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necessary to lock them when ion memory is about to be added/freed
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to avoid racing cases.
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CRs-Fixed: 1071809
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Change-Id: I436ead23c93384961b38ca99b9312a40c50ad03a
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Signed-off-by: Walter Yang <yandongy@codeaurora.org>
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---
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drivers/misc/qcom/qdsp6v2/audio_utils_aio.c | 22 +++++++++++++++++++++-
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1 file changed, 21 insertions(+), 1 deletion(-)
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diff --git a/drivers/misc/qcom/qdsp6v2/audio_utils_aio.c b/drivers/misc/qcom/qdsp6v2/audio_utils_aio.c
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index 8041111..7a4bae3 100644
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--- a/drivers/misc/qcom/qdsp6v2/audio_utils_aio.c
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+++ b/drivers/misc/qcom/qdsp6v2/audio_utils_aio.c
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@@ -1,6 +1,6 @@
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/* Copyright (C) 2008 Google, Inc.
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* Copyright (C) 2008 HTC Corporation
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- * Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.
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+ * Copyright (c) 2009-2016, The Linux Foundation. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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@@ -570,6 +570,8 @@ int audio_aio_release(struct inode *inode, struct file *file)
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struct q6audio_aio *audio = file->private_data;
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pr_debug("%s[%p]\n", __func__, audio);
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mutex_lock(&audio->lock);
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+ mutex_lock(&audio->read_lock);
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+ mutex_lock(&audio->write_lock);
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audio->wflush = 1;
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if (audio->enabled)
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audio_aio_flush(audio);
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@@ -584,6 +586,8 @@ int audio_aio_release(struct inode *inode, struct file *file)
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wake_up(&audio->event_wait);
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audio_aio_reset_event_queue(audio);
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q6asm_audio_client_free(audio->ac);
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+ mutex_unlock(&audio->write_lock);
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+ mutex_unlock(&audio->read_lock);
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mutex_unlock(&audio->lock);
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mutex_destroy(&audio->lock);
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mutex_destroy(&audio->read_lock);
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@@ -1679,7 +1683,11 @@ static long audio_aio_ioctl(struct file *file, unsigned int cmd,
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__func__);
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rc = -EFAULT;
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} else {
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+ mutex_lock(&audio->read_lock);
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+ mutex_lock(&audio->write_lock);
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rc = audio_aio_ion_add(audio, &info);
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+ mutex_unlock(&audio->write_lock);
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+ mutex_unlock(&audio->read_lock);
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}
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mutex_unlock(&audio->lock);
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break;
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@@ -1694,7 +1702,11 @@ static long audio_aio_ioctl(struct file *file, unsigned int cmd,
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__func__);
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rc = -EFAULT;
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} else {
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+ mutex_lock(&audio->read_lock);
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+ mutex_lock(&audio->write_lock);
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rc = audio_aio_ion_remove(audio, &info);
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+ mutex_unlock(&audio->write_lock);
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+ mutex_unlock(&audio->read_lock);
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}
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mutex_unlock(&audio->lock);
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break;
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@@ -1996,7 +2008,11 @@ static long audio_aio_compat_ioctl(struct file *file, unsigned int cmd,
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} else {
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info.fd = info_32.fd;
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info.vaddr = compat_ptr(info_32.vaddr);
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+ mutex_lock(&audio->read_lock);
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+ mutex_lock(&audio->write_lock);
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rc = audio_aio_ion_add(audio, &info);
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+ mutex_unlock(&audio->write_lock);
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+ mutex_unlock(&audio->read_lock);
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}
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mutex_unlock(&audio->lock);
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break;
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@@ -2013,7 +2029,11 @@ static long audio_aio_compat_ioctl(struct file *file, unsigned int cmd,
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} else {
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info.fd = info_32.fd;
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info.vaddr = compat_ptr(info_32.vaddr);
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+ mutex_lock(&audio->read_lock);
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+ mutex_lock(&audio->write_lock);
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rc = audio_aio_ion_remove(audio, &info);
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+ mutex_unlock(&audio->write_lock);
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+ mutex_unlock(&audio->read_lock);
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}
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mutex_unlock(&audio->lock);
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break;
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--
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cgit v1.1
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