linux-kernel - Re: [PATCH v2] crypto: atmel: Use dev_err_probe instead of dev

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Date:   Wed, 26 Jul 2023 15:54:39 +0000
From:   <Ryan.Wanner@...rochip.com>
To:     <machel@...o.com>, <herbert@...dor.apana.org.au>,
        <davem@...emloft.net>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <Claudiu.Beznea@...rochip.com>,
        <linux-crypto@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <opensource.kernel@...o.com>
Subject: Re: [PATCH v2] crypto: atmel: Use dev_err_probe instead of dev_err

On 7/26/23 05:04, Wang Ming wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> It is possible that dma_request_chan will return EPROBE_DEFER,
> which means that dd->dev is not ready yet. In this case,
> dev_err(dd->dev), there will be no output. This patch fixes the bug.
> 
> Signed-off-by: Wang Ming <machel@...o.com>
Reviewed-by: Ryan Wanner <Ryan.Wanner@...rochip.com>
> ---
>  drivers/crypto/atmel-sha.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
> index 6bef634d3c86..5682957f805d 100644
> --- a/drivers/crypto/atmel-sha.c
> +++ b/drivers/crypto/atmel-sha.c
> @@ -2499,8 +2499,8 @@ static int atmel_sha_dma_init(struct atmel_sha_dev *dd)
>  {
>         dd->dma_lch_in.chan = dma_request_chan(dd->dev, "tx");
>         if (IS_ERR(dd->dma_lch_in.chan)) {
> -               dev_err(dd->dev, "DMA channel is not available\n");
> -               return PTR_ERR(dd->dma_lch_in.chan);
> +               return dev_err_probe(dd->dev, PTR_ERR(dd->dma_lch_in.chan),
> +                       "DMA channel is not available\n");
>         }
> 
>         dd->dma_lch_in.dma_conf.dst_addr = dd->phys_base +
> --
> 2.25.1
>