kernel/linux.git/drivers/mtd/mtdpart.c, branch linux-6.0.y

mtd: call of_platform_populate() for MTD partitions

2022-05-16T16:37:48+00:00

Until this change MTD subsystem supported handling partitions only with MTD partitions parsers. That's a specific / limited API designed around partitions. Some MTD partitions may however require different handling. They may contain specific data that needs to be parsed and somehow extracted. For that purpose MTD subsystem should allow binding of standard platform drivers. An example can be U-Boot (sub)partition with environment variables. There exist a "u-boot,env" DT binding for MTD (sub)partition that requires an NVMEM driver. Ref: 5db1c2dbc04c ("dt-bindings: nvmem: add U-Boot environment variables binding") Signed-off-by: Rafał Miłecki Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20220510131259.555-1-zajec5@gmail.com

mtd: Fixed breaking list in __mtd_del_partition.

2021-12-03T13:27:18+00:00

Not the child partition should be removed from the partition list but the partition itself. Otherwise the partition list gets broken and any subsequent remove operations leads to a kernel panic. Fixes: 46b5889cc2c5 ("mtd: implement proper partition handling") Signed-off-by: Andreas Oetken Cc: stable@vger.kernel.org Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20211102172604.2921065-1-andreas.oetken@siemens-energy.com

mtd: mtdpart: use DEVICE_ATTR_RO() helper macro

2021-06-11T18:42:45+00:00

Use DEVICE_ATTR_RO() helper macro instead of plain DEVICE_ATTR(), which makes the code a bit shorter and easier to read. Signed-off-by: Zhen Lei Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20210603123041.12036-1-thunder.leizhen@huawei.com

mtd: mtdpart: Convert sysfs sprintf/snprintf family to sysfs_emit

2021-05-10T08:44:43+00:00

Use sysfs_emit instead of snprintf to avoid buf overrun,because in sysfs_emit it strictly checks whether buf is null or buf whether pagesize aligned, otherwise it returns an error. Signed-off-by: Tian Tao Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/1618220144-33839-3-git-send-email-tiantao6@hisilicon.com

mtd: don't lock when recursively deleting partitions

2021-03-11T08:37:49+00:00

When recursively deleting partitions, don't acquire the masters partition lock twice. Otherwise the process ends up in a deadlocked state. Fixes: 46b5889cc2c5 ("mtd: implement proper partition handling") Signed-off-by: David Bauer Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20210217195320.893253-1-mail@david-bauer.net

mtd: mtdpart: Fix misdocumented function parameter 'mtd'

2020-11-20T11:37:29+00:00

Fixes the following W=1 kernel build warning(s): drivers/mtd/mtdpart.c:300: warning: Function parameter or member 'mtd' not described in '__mtd_del_partition' drivers/mtd/mtdpart.c:300: warning: Excess function parameter 'priv' description in '__mtd_del_partition' Cc: Miquel Raynal Cc: Richard Weinberger Cc: Vignesh Raghavendra Cc: Nicolas Pitre Cc: Thomas Gleixner Cc: David Woodhouse Cc: linux-mtd@lists.infradead.org Signed-off-by: Lee Jones Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20201109182206.3037326-2-lee.jones@linaro.org

mtd: Add support for emulated SLC mode on MLC NANDs

2020-05-11T07:51:41+00:00

MLC NANDs can be made a bit more reliable if we only program the lower page of each pair. At least, this solves the paired-pages corruption issue. Signed-off-by: Boris Brezillon Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200503155341.16712-5-miquel.raynal@bootlin.com

mtd: implement proper partition handling

2020-03-11T13:49:30+00:00

Instead of collecting partitions in a flat list, create a hierarchy within the mtd_info structure: use a partitions list to keep track of the partitions of an MTD device (which might be itself a partition of another MTD device), a pointer to the parent device (NULL when the MTD device is the root one, not a partition). By also saving directly in mtd_info the offset of the partition, we can get rid of the mtd_part structure. While at it, be consistent in the naming of the mtd_info structures to ease the understanding of the new hierarchy: these structures are usually called 'mtd', unless there are multiple instances of the same structure. In this case, there is usually a parent/child bound so we will call them 'parent' and 'child'. Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20200114090952.11232-1-miquel.raynal@bootlin.com

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102

2019-05-24T15:39:00+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 51 franklin st fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 50 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190523091649.499889647@linutronix.de Signed-off-by: Greg Kroah-Hartman

mtd: part: fix incorrect format specifier for an unsigned long long

2019-05-06T19:57:06+00:00

An unsigned long long is being formatted with %lld instead of the unsigned version %llu. Fix this. Clean up cppcheck warning: %lld in format string (no. 1) requires 'long long' but the argument type is 'unsigned long long'. Fixes: a62c24d75529 ("mtd: part: Add sysfs variable for offset of partition") Signed-off-by: Colin Ian King Signed-off-by: Richard Weinberger