From f31559af97a0eabd467e4719253675b7dccb8a46 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Mon, 21 Dec 2020 20:24:35 +0800
Subject: [PATCH] staging: fwserial: Fix error handling in fwserial_create
Git-commit: f31559af97a0eabd467e4719253675b7dccb8a46
Patch-mainline: v5.12-rc1
References: git-fixes

When fw_core_add_address_handler() fails, we need to destroy
the port by tty_port_destroy(). Also we need to unregister
the address handler by fw_core_remove_address_handler() on
failure.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20201221122437.10274-1-dinghao.liu@zju.edu.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/staging/fwserial/fwserial.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index db83d34cd677..c368082aae1a 100644
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -2189,6 +2189,7 @@ static int fwserial_create(struct fw_unit *unit)
 		err = fw_core_add_address_handler(&port->rx_handler,
 						  &fw_high_memory_region);
 		if (err) {
+			tty_port_destroy(&port->port);
 			kfree(port);
 			goto free_ports;
 		}
@@ -2271,6 +2272,7 @@ static int fwserial_create(struct fw_unit *unit)
 
 free_ports:
 	for (--i; i >= 0; --i) {
+		fw_core_remove_address_handler(&serial->ports[i]->rx_handler);
 		tty_port_destroy(&serial->ports[i]->port);
 		kfree(serial->ports[i]);
 	}
-- 
2.26.2