From: Kefeng Wang <wangkefeng.w...@huawei.com>
[ Upstream commit c7ad9ba0611c53cfe194223db02e3bca015f0674 ]
When modprobe/rmmod/modprobe module, if platform_driver_register() fails,
the kernel complained,
proc_dir_entry 'driver/digicolor-usart' already registered
WARNING: CPU: 1 PID: 5636 at fs/proc/generic.c:360 proc_register+0x19d/0x270
Fix this by adding uart_unregister_driver() when platform_driver_register()
fails.
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.w...@huawei.com>
Acked-by: Baruch Siach <bar...@tkos.co.il>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/tty/serial/digicolor-usart.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/digicolor-usart.c
b/drivers/tty/serial/digicolor-usart.c
index f460cca139e2..13ac36e2da4f 100644
--- a/drivers/tty/serial/digicolor-usart.c
+++ b/drivers/tty/serial/digicolor-usart.c
@@ -541,7 +541,11 @@ static int __init digicolor_uart_init(void)
if (ret)
return ret;
- return platform_driver_register(&digicolor_uart_platform);
+ ret = platform_driver_register(&digicolor_uart_platform);
+ if (ret)
+ uart_unregister_driver(&digicolor_uart);
+
+ return ret;
}
module_init(digicolor_uart_init);
--
2.20.1
