linux-kernel - Re: [PATCH] mtd: spi-nor: core: Add an error message when failing to exit the 4-byte address mode

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Message-ID: <20220728120615.3422ojtdsfgmwy5p@ti.com>
Date:   Thu, 28 Jul 2022 17:36:15 +0530
From:   Pratyush Yadav <p.yadav@...com>
To:     Tudor Ambarus <tudor.ambarus@...rochip.com>
CC:     <pratyush@...nel.org>, <michael@...le.cc>,
        <miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mtd: spi-nor: core: Add an error message when failing to
 exit the 4-byte address mode

On 28/07/22 06:01AM, Tudor Ambarus wrote:
> Add an error message when failing to exit the 4-byte address mode. Do not
> stop the execution and go through the spi_nor_soft_reset() method if used,
> in the hope that the flash will default to 3-byte address mode after the
> reset.
> 
> Suggested-by: Pratyush Yadav <p.yadav@...com>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>

Reviewed-by: Pratyush Yadav <p.yadav@...com>

> ---
>  drivers/mtd/spi-nor/core.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
> index f2c64006f8d7..1cdbdad97136 100644
> --- a/drivers/mtd/spi-nor/core.c
> +++ b/drivers/mtd/spi-nor/core.c
> @@ -2841,7 +2841,8 @@ void spi_nor_restore(struct spi_nor *nor)
>  	/* restore the addressing mode */
>  	if (nor->addr_nbytes == 4 && !(nor->flags & SNOR_F_4B_OPCODES) &&
>  	    nor->flags & SNOR_F_BROKEN_RESET)
> -		nor->params->set_4byte_addr_mode(nor, false);
> +		if (nor->params->set_4byte_addr_mode(nor, false))
> +			dev_err(nor->dev, "Failed to exit 4-byte address mode\n");
>  
>  	if (nor->flags & SNOR_F_SOFT_RESET)
>  		spi_nor_soft_reset(nor);
> -- 
> 2.25.1
> 

-- 
Regards,
Pratyush Yadav
Texas Instruments Inc.