kernel/drivers/mtd/mtdpart.c, branch linux-6.9.y

mtd: mtdpart: check for subpartitions parsing result

2023-10-16T08:50:32Z

parse_mtd_partitions() may return an error so it should be checked and optionally passed up Signed-off-by: Rafał Miłecki Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230927202657.27169-1-zajec5@gmail.com

mtd: use refcount to prevent corruption

2023-07-12T11:30:08Z

When underlying device is removed mtd core will crash in case user space is holding open handle. Need to use proper refcounting so device is release only when has no users. Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20230620131905.648089-2-alexander.usyskin@intel.com

mtd: mtdpart: Drop useless LIST_HEAD

2023-06-09T15:27:14Z

'tmp_list' is unused, so drop it. Signed-off-by: Christophe JAILLET Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/547248195d87d1240d6126d13eb1364b1a0b634d.1685853690.git.christophe.jaillet@wanadoo.fr

mtd: mtdpart: Don't create platform device that'll never probe

2023-02-08T12:37:55Z

These "nvmem-cells" platform devices never get probed because there's no platform driver for it and it's never used anywhere else. So it's a waste of memory. These devices also cause fw_devlink to block nvmem consumers of "nvmem-cells" partition from probing because the supplier device never probes. So stop creating platform devices for nvmem-cells partitions to avoid wasting memory and to avoid blocking probing of consumers. Reported-by: Maxim Kiselev Fixes: bcdf0315a61a ("mtd: call of_platform_populate() for MTD partitions") Signed-off-by: Saravana Kannan Tested-by: Maksim Kiselev Tested-by: Douglas Anderson Tested-by: Geert Uytterhoeven Tested-by: Luca Weiss # qcom/sm7225-fairphone-fp4 Link: https://lore.kernel.org/r/20230207014207.1678715-13-saravanak@google.com Signed-off-by: Greg Kroah-Hartman

mtd: call of_platform_populate() for MTD partitions

2022-05-16T16:37:48Z

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.

2021-12-03T13:27:18Z

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

2021-06-11T18:42:45Z

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

2021-05-10T08:44:43Z

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

2021-03-11T08:37:49Z

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'

2020-11-20T11:37:29Z

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