From 01ea848b31d0eb07f799ec874bf20e016f17c5e9 Mon Sep 17 00:00:00 2001
From: Jiacheng Ou <oujc1@lenovo.com>
Date: Thu, 10 Oct 2019 13:35:51 +0800
Subject: [PATCH] sensor:sometimes avc error after reboot

Issue:
Sometimes avc error after reboot:
avc: denied { write  } for comm="capsense_reset" name="reset"
dev="sysfs" ino=54780 scontext=u:r:capsense_reset:s0 tcontext
=u:object_r:sysfs:s0 tclass=file permissive=0 pkg=""

Rootcause:
class_register logic:
-create sysfs dir 'capsense'
-send uevent 'add' to hal
-create sysfs file 'reset'
Most of times sysfs file haven't create while ueventd monitor 'ADD'
to fresh sys/class/capsense label as 'sysfs_capsense',file under
capsense will inherit /sys label ,which is 'sysfs'.

Fix:
Send uevent 'CHANGE' again to HAL,so that relabeling
'/sys/class/capsense/*'.

Change-Id: If6ddf3205a9f299e0617814d341827357ecb126f
Signed-off-by: Jiacheng Ou <oujc1@motorola.com>
Reviewed-on: https://gerrit.mot.com/1434771
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key

Conflicts:
	drivers/misc/sx933x/Kbuild
Change-Id: I95404ee83cee74369af2c5b1a8e8152d3699300d
Reviewed-on: https://gerrit.mot.com/1435914
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Jiacheng Ou <oujc1@motorola.com>
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key
---
 drivers/misc/sx933x/Kbuild       | 5 +++++
 drivers/misc/sx933x/sx933x_sar.c | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/misc/sx933x/Kbuild b/drivers/misc/sx933x/Kbuild
index b50d44bc4a23..c32c08d718d2 100644
--- a/drivers/misc/sx933x/Kbuild
+++ b/drivers/misc/sx933x/Kbuild
@@ -1,3 +1,7 @@
+KERNEL_DIR_PATH = $(shell find $(TOP)/kernel/ -name "msm-*" | head -1)
+
+KERNEL_VERSION_NAME = $(shell basename $(KERNEL_DIR_PATH))
+
 # add -Wall to try to catch everything we can.
 EXTRA_CFLAGS += -Wall
 EXTRA_CFLAGS += -I$(TOP)/motorola/kernel/modules/include
@@ -32,6 +36,7 @@ ifneq (,$(filter burton%,$(TARGET_PRODUCT)))
 EXTRA_CFLAGS += -DCONFIG_CAPSENSE_USB_CAL
 endif
 
+EXTRA_CFLAGS += -I$(TOP)/kernel/$(KERNEL_VERSION_NAME)/drivers/base
 KBUILD_EXTRA_SYMBOLS += $(CURDIR)/$(KBUILD_EXTMOD)/../../sensors/Module.symvers
 
 sx932x_sar-y := sx933x_sar.o
diff --git a/drivers/misc/sx933x/sx933x_sar.c b/drivers/misc/sx933x/sx933x_sar.c
index 3bfcd97e15d6..19fefa0bdc11 100644
--- a/drivers/misc/sx933x/sx933x_sar.c
+++ b/drivers/misc/sx933x/sx933x_sar.c
@@ -34,6 +34,7 @@
 #include <linux/power_supply.h>
 #include <linux/sensors.h>
 #include "../../../include/linux/input/sx933x.h"	/* main struct, interrupt,init,pointers */
+#include "base.h"
 
 #define SX933x_DEBUG 0
 #define LOG_TAG "[sar SX933x]: "
@@ -1001,6 +1002,9 @@ static int sx933x_probe(struct i2c_client *client, const struct i2c_device_id *i
 				return err;
 			}
 
+			/*restore sys/class/capsense label*/
+			kobject_uevent(&capsense_class.p->subsys.kobj, KOBJ_CHANGE);
+
 			/* Add Pointer to main platform data struct */
 			pDevice->hw = pplatData;