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[ Upstream commit38fb6d0ea3] The kernel mount_block_root() function expects -EACESS or -EINVAL for a unmountable filesystem when trying to mount the root with different filesystem types. However, in 5.3-rc1 the behavior when F2FS code cannot find valid block changed to return -EFSCORRUPTED(-EUCLEAN), and this error code makes mount_block_root() fail when trying to probe F2FS. When the magic number of the superblock mismatches, it has a high probability that it's just not a F2FS. In this case return -EINVAL seems to be a better result, and this return value can make mount_block_root() probing work again. Return -EINVAL when the superblock has magic mismatch, -EFSCORRUPTED in other cases (the magic matches but the superblock cannot be recognized). Fixes:10f966bbf5("f2fs: use generic EFSBADCRC/EFSCORRUPTED") Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.