mmc: jz4740: Use dev_err_probe()

From: Ye Xingchen <ye.xingchen@zte.com.cn>

Replace the open-code with dev_err_probe() to simplify the code.

Signed-off-by: Ye Xingchen <ye.xingchen@zte.com.cn>
---
 drivers/mmc/host/jz4740_mmc.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

On 3/22/23 12:07 PM, ye.xingchen@zte.com.cn wrote:

> From: Ye Xingchen <ye.xingchen@zte.com.cn>
> 
> Replace the open-code with dev_err_probe() to simplify the code.
> 
> Signed-off-by: Ye Xingchen <ye.xingchen@zte.com.cn>
> ---
>  drivers/mmc/host/jz4740_mmc.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
> index 698450afa7bb..a6ad03b24add 100644
> --- a/drivers/mmc/host/jz4740_mmc.c
> +++ b/drivers/mmc/host/jz4740_mmc.c
> @@ -232,10 +232,7 @@ static int jz4740_mmc_acquire_dma_channels(struct jz4740_mmc_host *host)
>  	if (!IS_ERR(host->dma_tx))
>  		return 0;
> 
> -	if (PTR_ERR(host->dma_tx) != -ENODEV) {
> -		dev_err(dev, "Failed to get dma tx-rx channel\n");
> -		return PTR_ERR(host->dma_tx);
> -	}
> +	return dev_err_probe(dev, PTR_ERR(host->dma_tx), "Failed to get dma tx-rx channel\n");

   I'm afraid this makes the following code unreachable...

> 
>  	host->dma_tx = dma_request_chan(mmc_dev(host->mmc), "tx");
>  	if (IS_ERR(host->dma_tx)) {

MBR, Sergey

On 3/22/23 02:25, Paul Cercueil wrote:
> Le mercredi 22 mars 2023 à 12:18 +0300, Sergei Shtylyov a écrit :
>> On 3/22/23 12:07 PM, ye.xingchen@zte.com.cn wrote:
>>
>>> From: Ye Xingchen <ye.xingchen@zte.com.cn>
>>>
>>> Replace the open-code with dev_err_probe() to simplify the code.
>>>
>>> Signed-off-by: Ye Xingchen <ye.xingchen@zte.com.cn>
>>> ---
>>>   drivers/mmc/host/jz4740_mmc.c | 5 +----
>>>   1 file changed, 1 insertion(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/mmc/host/jz4740_mmc.c
>>> b/drivers/mmc/host/jz4740_mmc.c
>>> index 698450afa7bb..a6ad03b24add 100644
>>> --- a/drivers/mmc/host/jz4740_mmc.c
>>> +++ b/drivers/mmc/host/jz4740_mmc.c
>>> @@ -232,10 +232,7 @@ static int
>>> jz4740_mmc_acquire_dma_channels(struct jz4740_mmc_host *host)
>>>          if (!IS_ERR(host->dma_tx))
>>>                  return 0;
>>>
>>> -       if (PTR_ERR(host->dma_tx) != -ENODEV) {
>>> -               dev_err(dev, "Failed to get dma tx-rx channel\n");
>>> -               return PTR_ERR(host->dma_tx);
>>> -       }
>>> +       return dev_err_probe(dev, PTR_ERR(host->dma_tx), "Failed to
>>> get dma tx-rx channel\n");
>>     I'm afraid this makes the following code unreachable...
> Also, this is not a probe(), so I don't see a point of using
> dev_err_probe() here.
The function is only called from probe(), I think it makes sense to use 
dev_err_probe() here.