Re: [PATCH] usb: bdc: Remove duplicate error message in bdc_probe()

[Tang Bin <tangbin@cmss.chinamobile.com>]

Hi Greg KH:

在 2020/9/27 21:45, Greg KH 写道:
> On Sun, Sep 27, 2020 at 09:42:18PM +0800, Tang Bin wrote:
>> In this function, we don't need dev_err() message because
>> when something goes wrong, devm_platform_ioremap_resource()
>> can print an error message itself, so remove the redundant
>> one.
>>
>> Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
>> Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
>> ---
>>   drivers/usb/gadget/udc/bdc/bdc_core.c | 4 +---
>>   1 file changed, 1 insertion(+), 3 deletions(-)
>>
>> diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
>> index 02a3a7746..9454f179e 100644
>> --- a/drivers/usb/gadget/udc/bdc/bdc_core.c
>> +++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
>> @@ -508,10 +508,8 @@ static int bdc_probe(struct platform_device *pdev)
>>   	bdc->clk = clk;
>>   
>>   	bdc->regs = devm_platform_ioremap_resource(pdev, 0);
>> -	if (IS_ERR(bdc->regs)) {
>> -		dev_err(dev, "ioremap error\n");
>> +	if (IS_ERR(bdc->regs))
>>   		return -ENOMEM;
> Why not return the error given to us?

Because when get ioremap failed, devm_platform_ioremap_resource() can 
print error message

"dev_err(dev, "ioremap failed for resource %pR\n", res)" in it's called 
function. So I think this's place's

dev_err(dev, "ioremap error\n") is redundant.


Thanks

Tang Bin


>