linux-kernel - Re: [PATCH] serial: sh-sci: Missing uart_unregister_driver() on error in sci_probe

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Date:   Mon, 11 Mar 2019 17:33:44 +0800
From:   maowenan <maowenan@...wei.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
CC:     <gregkh@...uxfoundation.org>, <jslaby@...e.com>,
        <linux-serial@...r.kernel.org>, <kernel-janitors@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] serial: sh-sci: Missing uart_unregister_driver() on error
 in sci_probe_single()



On 2019/3/11 15:22, Dan Carpenter wrote:
> On Fri, Mar 08, 2019 at 10:23:10PM +0800, Mao Wenan wrote:
>> Add the missing uart_unregister_driver() before return
>> from sci_probe_single() in the error handling case.
>>
>> Signed-off-by: Mao Wenan <maowenan@...wei.com>
>> ---
>>  drivers/tty/serial/sh-sci.c | 4 +++-
>>  1 file changed, 3 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
>> index 64bbeb7d7e0c..dde4eac9d222 100644
>> --- a/drivers/tty/serial/sh-sci.c
>> +++ b/drivers/tty/serial/sh-sci.c
>> @@ -3254,8 +3254,10 @@ static int sci_probe_single(struct platform_device *dev,
>>  	mutex_unlock(&sci_uart_registration_lock);
>>  
>>  	ret = sci_init_single(dev, sciport, index, p, false);
>> -	if (ret)
>> +	if (ret) {
>> +		uart_unregister_driver(&sci_uart_driver);
>>  		return ret;
> 
> Why only this error path and not the next one?
> 
>> +	}
>>  
>>  	sciport->gpios = mctrl_gpio_init(&sciport->port, 0);
>>  	if (IS_ERR(sciport->gpios) && PTR_ERR(sciport->gpios) != -ENOSYS)
>             ^^^^^^^^^^^^^^^^^^^^^
> This one.

yes, this one need it too. resend v2.
thank you.
> 
> regards,
> dan carpenter
> 
> 
> .
>