kernel/drivers/mtd/chips/cfi_probe.c, branch linux-rolling-stable

mtd: cfi: use struct_size() helper for cfiq allocation

2025-09-29T16:01:32Z

Documentation/process/deprecated.rst recommends against performing dynamic size calculations in the arguments of memory allocator function due to the risk of overflow. Such calculations can wrap around and result in a smaller allocation than what the caller was expecting. Replace the size calculation in cfiq allocation with struct_size() helper to make the code clearer and handle the overflows correctly. Signed-off-by: Gopi Krishna Menon Reviewed-by: Vignesh Raghavendra link: https://lore.kernel.org/linux-kernel-mentees/20250922071137.900508-1-rk0006818@gmail.com/T/#u Signed-off-by: Miquel Raynal

mtd: chips: Use SPDX license headers

2023-06-09T15:27:11Z

Some of the files in mtd/chips do not have a SPDX license header, presumably because the text string "GPL'd" didn't parse with Thomas rulesets for magic license tagging. Fix this, the code is initially from RedHat which clearly targeted the Linux kernel and intended it to be GPLv2. In any case the original author appears to be David Woodhouse who can then confirm this. Cc: David Woodhouse Cc: Thomas Gleixner Signed-off-by: Linus Walleij Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230603185200.3571174-1-linus.walleij@linaro.org

mtd: cfi: Add early fixup for S70GL02GS

2018-05-04T07:52:38Z

S70GL02GS flash reports a single 256 MiB chip, but is really made up of two 128 MiB chips with 1024 sectors each. Without early fixups (top half of device cannot be written or erased): ff0000000.nor-boot: Found 1 x16 devices at 0x0 in 16-bit bank. Amd/Fujitsu Extended Query Table at 0x0040 Amd/Fujitsu Extended Query version 1.5. number of CFI chips: 1 With early fixups (entire device can be written and erased): Bad S70GL02GS CFI data; adjust to detect 2 chips ff0000000.nor-boot: Found 1 x16 devices at 0x0 in 16-bit bank. ff0000000.nor-boot: Found 1 x16 devices at 0x8000000 in 16-bit bank Amd/Fujitsu Extended Query Table at 0x0040 Amd/Fujitsu Extended Query version 1.5. number of CFI chips: 2 Signed-off-by: Aaron Sierra Signed-off-by: Boris Brezillon

mtd: cfi: Support early CFI fixups

2018-05-04T07:50:19Z

Some CFI devices need fixups that affect the number of chips detected, but the current fixup infrastructure (struct cfi_fixup and cfi_fixup()) does not cover this situation. Introduce struct cfi_early_fixup and cfi_early_fixup() to fill the void. Signed-off-by: Aaron Sierra Signed-off-by: Boris Brezillon

mtd: cfi: Remove unnecessary OOM messages

2014-03-11T05:42:25Z

The site-specific OOM messages are unnecessary, because they duplicate the MM subsystem generic OOM message. Signed-off-by: Jingoo Han Signed-off-by: Brian Norris

mtd: cfi_cmdset_0002: make sector erase command variable

2010-10-26T10:39:17Z

Some old SST chips use 0x50 as sector erase command, instead of 0x30. Make this value variable to handle such chips. Signed-off-by: Guillaume LECERF Acked-by: Wolfram Sang Signed-off-by: David Woodhouse

mtd: cfi_probe: print manufacturer and id of probed chip

2010-08-02T08:05:20Z

Signed-off-by: Guillaume LECERF Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: cfi_probe: add support for SST 0x0701 vendorname

2010-05-14T00:08:11Z

SST 39VF160x and 39VF320x chips use vendorname id 0x0701 and alternative unlock addresses. Add support for them in cfi_probe.c. Signed-off-by: Guillaume LECERF Reviewed-by: Wolfram Sang Signed-off-by: David Woodhouse

mtd: cfi_probe: make the addresses used to enter Auto Select Mode variable

2010-05-14T00:07:49Z

Make the addresses used to enter Auto Select Mode variable to leave place for handling chips using non-standard addresses. Signed-off-by: Guillaume LECERF Reviewed-by: Wolfram Sang Signed-off-by: David Woodhouse

mtd: cfi_probe: enter Auto Select Mode after filling cfi->cfiq members

2010-05-14T00:07:42Z

Move the code to enter Auto Select Mode down to be able to use cfi->cfiq members to add support for chips using alternative sequence / unlock addresses. Signed-off-by: Guillaume LECERF Reviewed-by: Wolfram Sang Signed-off-by: David Woodhouse