linux-kernel - Re: [PATCH] mtd: spi-nor: Lower the priority of the software reset failure message

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Message-ID: <cf4143937dea52a4a4f40ed602ec74b1@walle.cc>
Date:   Thu, 19 Oct 2023 09:44:44 +0200
From:   Michael Walle <michael@...le.cc>
To:     AceLan Kao <acelan.kao@...onical.com>
Cc:     Tudor Ambarus <tudor.ambarus@...aro.org>,
        Pratyush Yadav <pratyush@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: spi-nor: Lower the priority of the software reset
 failure message

Hi,

> Not all SPI drivers support soft reset enable and soft reset commands.
> This failure is expected and not critical.

This is not really expected. What driver is this? Let me guess, the 
intel
SPI driver.

Please mention this in the commit message.

> Thus, we avoid reporting it
> to regular users to prevent potential confusion regarding power-off 
> issues.
> 
> Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@...onical.com>
> ---
>  drivers/mtd/spi-nor/core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
> index 1b0c6770c14e..7bca8ffcd756 100644
> --- a/drivers/mtd/spi-nor/core.c
> +++ b/drivers/mtd/spi-nor/core.c
> @@ -3252,7 +3252,7 @@ static void spi_nor_soft_reset(struct spi_nor 
> *nor)
> 
>  	ret = spi_mem_exec_op(nor->spimem, &op);
>  	if (ret) {
> -		dev_warn(nor->dev, "Software reset failed: %d\n", ret);
> +		dev_info(nor->dev, "Software reset failed: %d\n", ret);

What is the value of ret here? Ideally it should be -EOPNOTSUPP and then
don't print this message at all. Otherwise leave it at dev_warn(). Also,
please add a comment here.

-michael