From 8eb26142f2019cdc40358bacd3a3b0cc927821ff Mon Sep 17 00:00:00 2001
From: haojl2 <haojl2@motorola.com>
Date: Wed, 28 Aug 2019 15:35:47 +0800
Subject: [PATCH] focaltech_0flash_mmi: Add suspend resume mutex

TP:
Add a mutex to lock suspend and resume function
This is used by touch virtual sensor

Change-Id: I816fa9347299313a392ad9e0b4e4991aac74fef3
Signed-off-by: haojl2 <haojl2@motorola.com>
Reviewed-on: https://gerrit.mot.com/1411930
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Guobin Zhang <zhanggb@motorola.com>
Submit-Approved: Jira Key
---
 .../focaltech_0flash_mmi/focaltech_core.c     | 25 +++++++++++++++++--
 .../focaltech_0flash_mmi/focaltech_core.h     |  1 +
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.c b/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.c
index c70eafae97a3..1a4a42e46200 100755
--- a/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.c
+++ b/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.c
@@ -1712,6 +1712,7 @@ static int fts_ts_probe_entry(struct fts_ts_data *ts_data)
     spin_lock_init(&ts_data->irq_lock);
     mutex_init(&ts_data->report_mutex);
     mutex_init(&ts_data->bus_lock);
+    mutex_init(&ts_data->suspend_resume_mutex);
 #ifdef FOCALTECH_SENSOR_EN
     mutex_init(&ts_data->state_mutex);
     //unknown screen state
@@ -1976,7 +1977,7 @@ static int fts_ts_remove_entry(struct fts_ts_data *ts_data)
     return 0;
 }
 
-static int fts_ts_suspend(struct device *dev)
+static int _fts_ts_suspend(struct device *dev)
 {
     int ret = 0;
     struct fts_ts_data *ts_data = fts_data;
@@ -2065,7 +2066,17 @@ static int fts_ts_suspend(struct device *dev)
     return 0;
 }
 
-static int fts_ts_resume(struct device *dev)
+static int fts_ts_suspend(struct device *dev)
+{
+    int ret = 0;
+    mutex_lock(&fts_data->suspend_resume_mutex);
+    ret = _fts_ts_suspend(dev);
+    mutex_unlock(&fts_data->suspend_resume_mutex);
+
+    return ret;
+}
+
+static int _fts_ts_resume(struct device *dev)
 {
     struct fts_ts_data *ts_data = fts_data;
 
@@ -2141,6 +2152,16 @@ static int fts_ts_resume(struct device *dev)
     return 0;
 }
 
+static int fts_ts_resume(struct device *dev)
+{
+    int ret = 0;
+    mutex_lock(&fts_data->suspend_resume_mutex);
+    ret = _fts_ts_resume(dev);
+    mutex_unlock(&fts_data->suspend_resume_mutex);
+
+    return ret;
+}
+
 /*****************************************************************************
 * TP Driver
 *****************************************************************************/
diff --git a/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.h b/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.h
index 465b28862558..b0796e8ac813 100755
--- a/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.h
+++ b/drivers/input/touchscreen/focaltech_0flash_mmi/focaltech_core.h
@@ -179,6 +179,7 @@ struct fts_ts_data {
     struct delayed_work esdcheck_work;
     struct delayed_work prc_work;
     struct work_struct resume_work;
+    struct mutex suspend_resume_mutex;
     struct ftxxxx_proc proc;
     spinlock_t irq_lock;
     struct mutex report_mutex;