linux-kernel - Re: [PATCH v1 1/1] spi: fsl-dspi: Unify error messaging in dspi_request

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Message-ID: <20240204182417.jnw4iuqgghxynq3v@skbuf>
Date: Sun, 4 Feb 2024 20:24:17 +0200
From: Vladimir Oltean <olteanv@...il.com>
To: andy.shevchenko@...il.com
Cc: Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
	linux-kernel@...r.kernel.org, Minjie Du <duminjie@...o.com>
Subject: Re: [PATCH v1 1/1] spi: fsl-dspi: Unify error messaging in
 dspi_request_dma()

On Sun, Feb 04, 2024 at 06:21:06PM +0200, andy.shevchenko@...il.com wrote:
> Use `ret = dev_err_probe(...);` pattern for all messages in dspi_request_dma()
> for the sake of uniforming them. While at it, fix indentation issue reported
> by Vladimir Oltean.

When did I do that? This is v1.

> 
> Signed-off-by: Andy Shevchenko <andy.shevchenko@...il.com>
> ---
>  drivers/spi/spi-fsl-dspi.c | 15 +++++----------
>  1 file changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
> index c9eae046f66c..e0832f1f10bd 100644
> --- a/drivers/spi/spi-fsl-dspi.c
> +++ b/drivers/spi/spi-fsl-dspi.c
> @@ -502,15 +502,12 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr)
>  		return -ENOMEM;
>  
>  	dma->chan_rx = dma_request_chan(dev, "rx");
> -	if (IS_ERR(dma->chan_rx)) {
> -		return dev_err_probe(dev, PTR_ERR(dma->chan_rx),
> -			"rx dma channel not available\n");
> -	}
> +	if (IS_ERR(dma->chan_rx))
> +		return dev_err_probe(dev, PTR_ERR(dma->chan_rx), "rx dma channel not available\n");
>  
>  	dma->chan_tx = dma_request_chan(dev, "tx");
>  	if (IS_ERR(dma->chan_tx)) {
> -		ret = PTR_ERR(dma->chan_tx);
> -		dev_err_probe(dev, ret, "tx dma channel not available\n");
> +		ret = dev_err_probe(dev, PTR_ERR(dma->chan_tx), "tx dma channel not available\n");
>  		goto err_tx_channel;
>  	}
>  
> @@ -541,16 +538,14 @@ static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr)
>  	cfg.direction = DMA_DEV_TO_MEM;
>  	ret = dmaengine_slave_config(dma->chan_rx, &cfg);
>  	if (ret) {
> -		dev_err(dev, "can't configure rx dma channel\n");
> -		ret = -EINVAL;
> +		ret = dev_err_probe(dev, -EINVAL, "can't configure rx dma channel\n");

Passing -EINVAL to dev_err_probe() here doesn't work. It overwrites the "ret"
from dmaengine_slave_config().

int dev_err_probe(const struct device *dev, int err, const char *fmt, ...)
{
	struct va_format vaf;
	va_list args;

	va_start(args, fmt);
	vaf.fmt = fmt;
	vaf.va = &args;

	if (err != -EPROBE_DEFER) { // <-------- always true
		dev_err(dev, "error %pe: %pV", ERR_PTR(err), &vaf);
	} else {
		device_set_deferred_probe_reason(dev, &vaf);
		dev_dbg(dev, "error %pe: %pV", ERR_PTR(err), &vaf);
	}

	va_end(args);

	return err;
}

>  		goto err_slave_config;
>  	}
>  
>  	cfg.direction = DMA_MEM_TO_DEV;
>  	ret = dmaengine_slave_config(dma->chan_tx, &cfg);
>  	if (ret) {
> -		dev_err(dev, "can't configure tx dma channel\n");
> -		ret = -EINVAL;
> +		ret = dev_err_probe(dev, -EINVAL, "can't configure tx dma channel\n");

Same here.

>  		goto err_slave_config;
>  	}
>  
> -- 
> 2.43.0
> 
>