Re: [PATCH 02/11] spi: sprd: Simplify with dev_err_probe()

From: Chunyan Zhang <zhang.lyra@gmail.com>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Tudor Ambarus <tudor.ambarus@microchip.com>,
	Mark Brown <broonie@kernel.org>,
	Nicolas Ferre <nicolas.ferre@microchip.com>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Ludovic Desroches <ludovic.desroches@microchip.com>,
	Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Ray Jui <rjui@broadcom.com>,
	Scott Branden <sbranden@broadcom.com>,
	bcm-kernel-feedback-list@broadcom.com,
	Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Orson Zhai <orsonzhai@gmail.com>,
	Baolin Wang <baolin.wang7@gmail.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	Masahisa Kojima <masahisa.kojima@linaro.org>,
	Jassi Brar <jaswinder.singh@linaro.org>,
	Laxman Dewangan <ldewangan@nvidia.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	linux-spi@vger.kernel.org,
	Linux ARM <linux-arm-kernel@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-rpi-kernel@lists.infradead.org,
	linux-arm-msm@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-tegra@vger.kernel.org
Subject: Re: [PATCH 02/11] spi: sprd: Simplify with dev_err_probe()
Date: Tue, 8 Sep 2020 15:27:29 +0800	[thread overview]
Message-ID: <CAAfSe-v4o-9zQZOSgQfAU-C4ruJU7BJdHRe4ikghx7AFgh1qgg@mail.gmail.com> (raw)
In-Reply-To: <20200901152713.18629-2-krzk@kernel.org>

On Tue, 1 Sep 2020 at 23:27, Krzysztof Kozlowski <krzk@kernel.org> wrote:
>
> Common pattern of handling deferred probe can be simplified with
> dev_err_probe().  Less code and the error value gets printed.
>
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Acked-by: Chunyan Zhang <zhang.lyra@gmail.com>

Thanks,
Chunyan

> ---
>  drivers/spi/spi-sprd-adi.c |  5 +----
>  drivers/spi/spi-sprd.c     | 17 +++++------------
>  2 files changed, 6 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c
> index 127b8bd25831..392ec5cfa3d6 100644
> --- a/drivers/spi/spi-sprd-adi.c
> +++ b/drivers/spi/spi-sprd-adi.c
> @@ -504,10 +504,7 @@ static int sprd_adi_probe(struct platform_device *pdev)
>                         dev_info(&pdev->dev, "no hardware spinlock supplied\n");
>                         break;
>                 default:
> -                       dev_err(&pdev->dev,
> -                               "failed to find hwlock id, %d\n", ret);
> -                       fallthrough;
> -               case -EPROBE_DEFER:
> +                       dev_err_probe(&pdev->dev, ret, "failed to find hwlock id\n");
>                         goto put_ctlr;
>                 }
>         }
> diff --git a/drivers/spi/spi-sprd.c b/drivers/spi/spi-sprd.c
> index 0443fec3a6ab..635738f54c73 100644
> --- a/drivers/spi/spi-sprd.c
> +++ b/drivers/spi/spi-sprd.c
> @@ -553,22 +553,15 @@ static int sprd_spi_dma_tx_config(struct sprd_spi *ss, struct spi_transfer *t)
>  static int sprd_spi_dma_request(struct sprd_spi *ss)
>  {
>         ss->dma.dma_chan[SPRD_SPI_RX] = dma_request_chan(ss->dev, "rx_chn");
> -       if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_RX])) {
> -               if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]) == -EPROBE_DEFER)
> -                       return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]);
> -
> -               dev_err(ss->dev, "request RX DMA channel failed!\n");
> -               return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]);
> -       }
> +       if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_RX]))
> +               return dev_err_probe(ss->dev, PTR_ERR(ss->dma.dma_chan[SPRD_SPI_RX]),
> +                                    "request RX DMA channel failed!\n");
>
>         ss->dma.dma_chan[SPRD_SPI_TX]  = dma_request_chan(ss->dev, "tx_chn");
>         if (IS_ERR_OR_NULL(ss->dma.dma_chan[SPRD_SPI_TX])) {
>                 dma_release_channel(ss->dma.dma_chan[SPRD_SPI_RX]);
> -               if (PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]) == -EPROBE_DEFER)
> -                       return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
> -
> -               dev_err(ss->dev, "request TX DMA channel failed!\n");
> -               return PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]);
> +               return dev_err_probe(ss->dev, PTR_ERR(ss->dma.dma_chan[SPRD_SPI_TX]),
> +                                    "request TX DMA channel failed!\n");
>         }
>
>         return 0;
> --
> 2.17.1
>