linux-kernel - Re: [PATCH] mtd: spi-nor: winbond: fix w25q128 regression

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Date: Mon, 10 Jun 2024 20:10:46 +0200
From: e9hack <e9hack@...il.com>
To: Michael Walle <mwalle@...nel.org>,
 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>,
 Linus Walleij <linus.walleij@...aro.org>
Cc: linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mtd: spi-nor: winbond: fix w25q128 regression

Am 10.06.2024 um 09:48 schrieb Michael Walle:
> Commit 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> removed the flags for non-SFDP devices. It was assumed that it wasn't in
> use anymore. This turned out to be wrong. Add the no_sfdp_flags as
> well as the size again.
> 
> Reported-by: e9hack <e9hack@...il.com>

Reported-by: Hartmut Birr <e9hack@...il.com>

> Fixes: 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> Signed-off-by: Michael Walle <mwalle@...nel.org>
> ---
> Hartmut, Linus, could you please test it on your boards? Also, do
> you have a real name we should put in the Reported-by tag?

I cannot test it. I'm using OpenWRT on both routers. OpenWRT uses linux 6.6.32. The differences are to big.

Regards,
Hartmut

> 
> This will also need a manual backport to the stable kernels due to
> the new syntax. But that should be straight forward.
> ---
>   drivers/mtd/spi-nor/winbond.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
> index ca67bf2c46c3..6b6dec6f8faf 100644
> --- a/drivers/mtd/spi-nor/winbond.c
> +++ b/drivers/mtd/spi-nor/winbond.c
> @@ -105,7 +105,9 @@ static const struct flash_info winbond_nor_parts[] = {
>   	}, {
>   		.id = SNOR_ID(0xef, 0x40, 0x18),
>   		.name = "w25q128",
> +		.size = SZ_16M,
>   		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
> +		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
>   	}, {
>   		.id = SNOR_ID(0xef, 0x40, 0x19),
>   		.name = "w25q256",