touch: pt: cancel all pending works

In some scenarios, back to back suspend and resume calls causing
concurrency issues. This change cancel pending queued works before
executing current task.

Change-Id: I1c0971b68a08a4c634767ea1bb6d783f495a1093
Signed-off-by: Srinu Gorle <[email protected]>
Signed-off-by: Anand Abhishek <[email protected]>

pt/pt_core.c

@@ -10831,6 +10831,11 @@ static int pt_core_suspend(struct device *dev)
 		if (cd->cpdata->flags & PT_CORE_FLAG_SKIP_SYS_SLEEP)
 			return 0;
 
+		cancel_work_sync(&cd->resume_offload_work);
+		cancel_work_sync(&cd->suspend_offload_work);
+		cancel_work_sync(&cd->resume_work);
+		cancel_work_sync(&cd->suspend_work);
+
 		queue_work(cd->pt_workqueue, &cd->suspend_offload_work);
 		pt_debug(cd->dev, DL_ERROR, "%s End\n", __func__);
 
@@ -11004,6 +11009,11 @@ static int pt_core_resume(struct device *dev)
 	if (cd->cpdata->flags & PT_CORE_FLAG_SKIP_SYS_SLEEP)
 		return 0;
 
+	cancel_work_sync(&cd->resume_offload_work);
+	cancel_work_sync(&cd->suspend_offload_work);
+	cancel_work_sync(&cd->resume_work);
+	cancel_work_sync(&cd->suspend_work);
+
 	queue_work(cd->pt_workqueue, &cd->resume_offload_work);
 	pt_debug(cd->dev, DL_ERROR, "%s End\n", __func__);
 
@@ -12845,6 +12855,11 @@ static int drm_notifier_callback(struct notifier_block *self,
 			if (cd->fb_state != FB_ON) {
 				pt_debug(cd->dev, DL_INFO, "%s: Resume notifier called!\n",
 					__func__);
+				cancel_work_sync(&cd->resume_offload_work);
+				cancel_work_sync(&cd->suspend_offload_work);
+				cancel_work_sync(&cd->resume_work);
+				cancel_work_sync(&cd->suspend_work);
+
 				queue_work(cd->pt_workqueue, &cd->resume_work);
 #if defined(CONFIG_PM_SLEEP)
 				pt_debug(cd->dev, DL_INFO, "%s: Resume notifier called!\n",
@@ -12866,7 +12881,11 @@ static int drm_notifier_callback(struct notifier_block *self,
 				if (cd->cpdata->flags & PT_CORE_FLAG_SKIP_RUNTIME)
 					pt_core_suspend_(cd->dev);
 #endif
+				cancel_work_sync(&cd->resume_offload_work);
+				cancel_work_sync(&cd->suspend_offload_work);
 				cancel_work_sync(&cd->resume_work);
+				cancel_work_sync(&cd->suspend_work);
+
 				queue_work(cd->pt_workqueue, &cd->suspend_work);
 				cd->fb_state = FB_OFF;
 				pt_debug(cd->dev, DL_INFO, "%s: Suspend notified!\n", __func__);
@@ -17937,6 +17956,12 @@ int pt_release(struct pt_core_data *cd)
 	call_atten_cb(cd, PT_ATTEN_CANCEL_LOADER, 0);
 	cancel_work_sync(&cd->ttdl_restart_work);
 	cancel_work_sync(&cd->enum_work);
+	cancel_work_sync(&cd->resume_offload_work);
+	cancel_work_sync(&cd->suspend_offload_work);
+	cancel_work_sync(&cd->resume_work);
+	cancel_work_sync(&cd->suspend_work);
+	destroy_workqueue(cd->pt_workqueue);
+
 	pt_stop_wd_timer(cd);
 
 	pt_release_modules(cd);

pt/pt_regs.h

@@ -177,7 +177,7 @@ enum PT_DEBUG_LEVEL {
 	DL_DEBUG	= 4,
 	DL_MAX
 };
-#define PT_INITIAL_DEBUG_LEVEL DL_WARN
+#define PT_INITIAL_DEBUG_LEVEL DL_MAX
 
 /* Startup DUT enum status bitmask */
 enum PT_STARTUP_STATUS {