linux-kernel - Re: [PATCH] mtd: spi-nor: let SFDP determine the flash and sector size

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <56b679ea1b2424a55a8dc390ba23e7af@walle.cc>
Date:   Sat, 22 Jul 2023 14:56:20 +0200
From:   Michael Walle <michael@...le.cc>
To:     Tudor Ambarus <tudor.ambarus@...aro.org>
Cc:     tkuw584924@...il.com, takahiro.kuwano@...ineon.com,
        pratyush@...nel.org, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, bacem.daassi@...ineon.com,
        miquel.raynal@...tlin.com, richard@....at,
        Tudor Ambarus <tudor.ambarus@...aro.org>
Subject: Re: [PATCH] mtd: spi-nor: let SFDP determine the flash and sector
 size

Am 2023-07-22 06:59, schrieb Tudor Ambarus:
> sector_size is used to determine the flash size and the erase size in
> case of uniform erase. n_sectors is used to determine the flash_size.
> But the flash size and the erase sizes are determined when parsing 
> SFDP,
> let SFDP determine them.

Great! I have a similar patch in my preparation for the flash info
cleanup, but for all the flashes.

The flash size is overwritten if PARSE_SFDP is set anyway. So
that's fine. The sector_size is used for the erase ops and the BP
locking. The erase ops should be initialized with the BFPT, too.
So whats left is the BP locking, which is just used for gd25q256.
For now we'd need to leave the sector_size there.

Would you also drop the size and sector size for all other
PARSE_SFDP flashes?

In any case:
Reviewed-by: Michael Walle <michael@...le.cc>

-michael