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ASoC: wcd_cpe_core: Add mutex lock for CPE session

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Add mutex lock to ensure atomic access to core handle
in CPE alloc and dealloc sessions.

CRs-Fixed: 2169403
Bug: 62536960
Signed-off-by: Vaishnavi Kommaraju <vkommara@codeaurora.org>
Change-Id: Ic0bb7e1646cbeafe507680c39bb8de56086df47a
This commit is contained in:
Vaishnavi Kommaraju 2018-01-19 17:31:10 +05:30 committed by syphyr
parent fb3ab18a56
commit 4d261ae9ac
3 changed files with 19 additions and 3 deletions
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13
sound/soc/codecs/wcd_cpe_core.c
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
/* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -1943,6 +1943,7 @@ struct wcd_cpe_core *wcd_cpe_init(const char *img_fname,
init_completion(&core->online_compl);
init_waitqueue_head(&core->ssr_entry.offline_poll_wait);
mutex_init(&core->ssr_lock);
mutex_init(&core->session_lock);
core->cpe_users = 0;
core->cpe_clk_ref = 0;
@ -3432,6 +3433,7 @@ static struct cpe_lsm_session *wcd_cpe_alloc_lsm_session(
* If this is the first session to be allocated,
* only then register the afe service.
*/
WCD_CPE_GRAB_LOCK(&core->session_lock, "session_lock");
if (!wcd_cpe_lsm_session_active())
afe_register_service = true;
@ -3443,6 +3445,7 @@ static struct cpe_lsm_session *wcd_cpe_alloc_lsm_session(
dev_err(core->dev,
"%s: max allowed sessions already allocated\n",
__func__);
WCD_CPE_REL_LOCK(&core->session_lock, "session_lock");
return NULL;
}
@ -3451,6 +3454,7 @@ static struct cpe_lsm_session *wcd_cpe_alloc_lsm_session(
dev_err(core->dev,
"%s: Failed to enable cpe, err = %d\n",
__func__, ret);
WCD_CPE_REL_LOCK(&core->session_lock, "session_lock");
return NULL;
}
@ -3497,6 +3501,8 @@ static struct cpe_lsm_session *wcd_cpe_alloc_lsm_session(
init_completion(&session->cmd_comp);
lsm_sessions[session_id] = session;
WCD_CPE_REL_LOCK(&core->session_lock, "session_lock");
return session;
err_afe_mode_cmd:
@ -3511,6 +3517,7 @@ err_ret:
err_session_alloc:
wcd_cpe_vote(core, false);
WCD_CPE_REL_LOCK(&core->session_lock, "session_lock");
return NULL;
}
@ -3660,9 +3667,11 @@ static int wcd_cpe_dealloc_lsm_session(void *core_handle,
struct wcd_cpe_core *core = core_handle;
int ret = 0;
WCD_CPE_GRAB_LOCK(&core->session_lock, "session_lock");
if (!session) {
dev_err(core->dev,
"%s: Invalid lsm session\n", __func__);
WCD_CPE_REL_LOCK(&core->session_lock, "session_lock");
return -EINVAL;
}
@ -3673,6 +3682,7 @@ static int wcd_cpe_dealloc_lsm_session(void *core_handle,
"%s: Wrong session id %d max allowed = %d\n",
__func__, session->id,
WCD_CPE_LSM_MAX_SESSIONS);
WCD_CPE_REL_LOCK(&core->session_lock, "session_lock");
return -EINVAL;
}
@ -3693,6 +3703,7 @@ static int wcd_cpe_dealloc_lsm_session(void *core_handle,
"%s: Failed to un-vote cpe, err = %d\n",
__func__, ret);
WCD_CPE_REL_LOCK(&core->session_lock, "session_lock");
return ret;
}

5
sound/soc/codecs/wcd_cpe_core.h
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
/* Copyright (c) 2013-2015, 2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -169,6 +169,9 @@ struct wcd_cpe_core {
/* mutex to protect cpe ssr status variables */
struct mutex ssr_lock;
/* mutex to protect cpe session status variables */
struct mutex session_lock;
/* Store the calibration data needed for cpe */
struct cal_type_data *cal_data[WCD_CPE_LSM_CAL_MAX];

4
sound/soc/codecs/wcd_cpe_services.c
View file

@ -1,4 +1,4 @@
/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.
/* Copyright (c) 2014-2016, 2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -608,8 +608,10 @@ static enum cpe_svc_result cpe_deregister_generic(struct cpe_info *t_info,
return CPE_SVC_INVALID_HANDLE;
}
CPE_SVC_GRAB_LOCK(&cpe_d.cpe_svc_lock, "cpe_svc");
list_del(&(n->list));
kfree(reg_handle);
CPE_SVC_REL_LOCK(&cpe_d.cpe_svc_lock, "cpe_svc");
return CPE_SVC_SUCCESS;
}