Merge tag 'tag-chrome-platform-fixes-for-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux

Pull chrome platform fixes from Benson Leung:
 "Two fixes:

   - Fix locking and close a potential race condition in the new
     wilco_ec driver.

   - Fix a warning in cros_ec_debugfs on systems that do not support
     console logging, such as the Asus C201"

* tag 'tag-chrome-platform-fixes-for-v5.1-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
  platform/chrome: cros_ec_debugfs: cancel/schedule logging work only if supported
  platform/chrome: Fix locking pattern in wilco_ec_mailbox()

drivers/platform/chrome/cros_ec_debugfs.c

@@ -440,7 +440,7 @@ static int cros_ec_debugfs_probe(struct platform_device *pd)
 
 	ret = cros_ec_create_pdinfo(debug_info);
 	if (ret)
-		goto remove_debugfs;
+		goto remove_log;
 
 	ec->debug_info = debug_info;
 
@@ -448,6 +448,8 @@ static int cros_ec_debugfs_probe(struct platform_device *pd)
 
 	return 0;
 
+remove_log:
+	cros_ec_cleanup_console_log(debug_info);
 remove_debugfs:
 	debugfs_remove_recursive(debug_info->dir);
 	return ret;
@@ -467,7 +469,8 @@ static int __maybe_unused cros_ec_debugfs_suspend(struct device *dev)
 {
 	struct cros_ec_dev *ec = dev_get_drvdata(dev);
 
-	cancel_delayed_work_sync(&ec->debug_info->log_poll_work);
+	if (ec->debug_info->log_buffer.buf)
+		cancel_delayed_work_sync(&ec->debug_info->log_poll_work);
 
 	return 0;
 }
@@ -476,7 +479,8 @@ static int __maybe_unused cros_ec_debugfs_resume(struct device *dev)
 {
 	struct cros_ec_dev *ec = dev_get_drvdata(dev);
 
-	schedule_delayed_work(&ec->debug_info->log_poll_work, 0);
+	if (ec->debug_info->log_buffer.buf)
+		schedule_delayed_work(&ec->debug_info->log_poll_work, 0);
 
 	return 0;
 }

drivers/platform/chrome/wilco_ec/mailbox.c

@@ -223,11 +223,11 @@ int wilco_ec_mailbox(struct wilco_ec_device *ec, struct wilco_ec_message *msg)
 		msg->command, msg->type, msg->flags, msg->response_size,
 		msg->request_size);
 
+	mutex_lock(&ec->mailbox_lock);
 	/* Prepare request packet */
 	rq = ec->data_buffer;
 	wilco_ec_prepare(msg, rq);
 
-	mutex_lock(&ec->mailbox_lock);
 	ret = wilco_ec_transfer(ec, msg, rq);
 	mutex_unlock(&ec->mailbox_lock);