linux-kernel - Re: [PATCH v2] mtd: spi-nor: winbond: fix w25q128 regression

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Date: Fri, 21 Jun 2024 13:43:53 +0100
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Michael Walle <mwalle@...nel.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,
 Esben Haabendal <esben@...nix.com>, Hartmut Birr <e9hack@...il.com>
Subject: Re: [PATCH v2] mtd: spi-nor: winbond: fix w25q128 regression



On 6/21/24 1:09 PM, Michael Walle wrote:
> 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 wasn't true. Add the no_sfdp_flags as well as the size
> again.
> 
> We add the additional flags for dual and quad read because they have
> been reported to work properly by Hartmut using both older and newer
> versions of this flash, the similar flashes with 64Mbit and 256Mbit
> already have these flags and because it will (luckily) trigger our
> legacy SFDP parsing, so newer versions with SFDP support will still get
> the parameters from the SFDP tables.
> 
> Reported-by: Hartmut Birr <e9hack@...il.com>
> Closes: https://lore.kernel.org/r/CALxbwRo_-9CaJmt7r7ELgu+vOcgk=xZcGHobnKf=oT2=u4d4aA@mail.gmail.com/
> Fixes: 83e824a4a595 ("mtd: spi-nor: Correct flags for Winbond w25q128")
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Michael Walle <mwalle@...nel.org>

Acked-by: Tudor Ambarus <tudor.ambarus@...aro.org>

> ---
> As mentioned this is for fixing the regression and a proper fix will
> make use of the TRY_SFDP (or whatever it will be named) mechanism.
> ---
>  drivers/mtd/spi-nor/winbond.c | 2 ++
>  1 file changed, 2 insertions(+)