linux-dev/drivers/lightnvm, branch master

remove the lightnvm subsystem

2021-08-14T21:54:09Z

Lightnvm supports the OCSSD 1.x and 2.0 specs which were early attempts to produce Open Channel SSDs and never made it into the NVMe spec proper. They have since been superceeded by NVMe enhancements such as ZNS support. Remove the support per the deprecation schedule. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20210812132308.38486-1-hch@lst.de Reviewed-by: Matias Bjørling Reviewed-by: Javier González Signed-off-by: Jens Axboe

lightnvm: convert to blk_alloc_disk/blk_cleanup_disk

2021-06-01T13:42:23Z

Convert the lightnvm driver to use the blk_alloc_disk and blk_cleanup_disk helpers to simplify gendisk and request_queue allocation. Signed-off-by: Christoph Hellwig Reviewed-by: Ulf Hansson Link: https://lore.kernel.org/r/20210521055116.1053587-12-hch@lst.de Signed-off-by: Jens Axboe

block: automatically enable GENHD_FL_EXT_DEVT

2021-06-01T13:42:23Z

Automatically set the GENHD_FL_EXT_DEVT flag for all disks allocated without an explicit number of minors. This is what all new block drivers should do, so make sure it is the default without boilerplate code. Signed-off-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Reviewed-by: Luis Chamberlain Reviewed-by: Ulf Hansson Link: https://lore.kernel.org/r/20210521055116.1053587-4-hch@lst.de Signed-off-by: Jens Axboe

lightnvm: deprecated OCSSD support and schedule it for removal in Linux 5.15

2021-04-13T15:16:12Z

Lightnvm was an innovative idea to expose more low-level control over SSDs. But it failed to get properly standardized and remains a non-standarized extension to NVMe that requires vendor specific quirks for a few now mostly obsolete SSD devices. The standardized ZNS command set for NVMe has take over a lot of the approaches and allows for fully standardized operation. Remove the Linux code to support open channel SSDs as the few production deployments of the above mentioned SSDs are using userspace driver stacks instead of the fairly limited Linux support. Signed-off-by: Christoph Hellwig Reviewed-by: Javier González Signed-off-by: Matias Bjørling Link: https://lore.kernel.org/r/20210413105257.159260-5-matias.bjorling@wdc.com Signed-off-by: Jens Axboe

lightnvm: return the correct return value

2021-04-13T15:16:12Z

When memdup_user returns an error, memdup_user has two different return values, use PTR_ERR to get the correct return value. Signed-off-by: Tian Tao Signed-off-by: Matias Bjørling Link: https://lore.kernel.org/r/20210413105257.159260-3-matias.bjorling@wdc.com Signed-off-by: Jens Axboe

lightnvm: pblk: Replace guid_copy() with export_guid()/import_guid()

2021-02-15T04:27:24Z

There is a specific API to treat raw data as GUID, i.e. export_guid() and import_guid(). Use them instead of guid_copy() with explicit casting. Signed-off-by: Andy Shevchenko Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

lightnvm: fix unnecessary NULL check warnings

2021-02-15T04:27:24Z

Remove NULL checks before vfree() to fix these warnings: ./drivers/lightnvm/pblk-gc.c:27:2-7: WARNING: NULL check before some freeing functions is not needed. Signed-off-by: Tian Tao Signed-off-by: Matias Bjørling Signed-off-by: Jens Axboe

block: store a block_device pointer in struct bio

2021-01-25T01:17:20Z

Replace the gendisk pointer in struct bio with a pointer to the newly improved struct block device. From that the gendisk can be trivially accessed with an extra indirection, but it also allows to directly look up all information related to partition remapping. Signed-off-by: Christoph Hellwig Acked-by: Tejun Heo Signed-off-by: Jens Axboe

lightnvm: fix memory leak when submit fails

2021-01-21T12:45:51Z

The allocated page is not released if error occurs in nvm_submit_io_sync_raw(). __free_page() is moved ealier to avoid possible memory leak issue. Fixes: aff3fb18f957 ("lightnvm: move bad block and chunk state logic to core") Signed-off-by: Pan Bian Signed-off-by: Jens Axboe

lightnvm: select CONFIG_CRC32

2021-01-03T21:54:44Z

Without CRC32 support, this fails to link: arm-linux-gnueabi-ld: drivers/lightnvm/pblk-init.o: in function `pblk_init': pblk-init.c:(.text+0x2654): undefined reference to `crc32_le' arm-linux-gnueabi-ld: drivers/lightnvm/pblk-init.o: in function `pblk_exit': pblk-init.c:(.text+0x2a7c): undefined reference to `crc32_le' Fixes: a4bd217b4326 ("lightnvm: physical block device (pblk) target") Signed-off-by: Arnd Bergmann Signed-off-by: Jens Axboe