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| author |   Kefeng Wang <wangkefeng.wang@huawei.com> | 2019-05-31 21:37:33 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-10 19:08:31 +0200 |
| commit | c7ad9ba0611c53cfe194223db02e3bca015f0674 (patch) | |
| tree | e47ab52bff63238a93c612e235f621b19fdffd1e /drivers/tty/serial | |
| parent | serial: stm32: Make stm32_get_databits static (diff) | |
| download | linux-dev-c7ad9ba0611c53cfe194223db02e3bca015f0674.tar.xz linux-dev-c7ad9ba0611c53cfe194223db02e3bca015f0674.zip | |
tty/serial: digicolor: Fix digicolor-usart already registered warning
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 <hulkci@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/digicolor-usart.c | 6 |
1 files changed, 5 insertions, 1 deletions
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); |