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f693b6485e
Following an ECC failure condition upon page reads, we shall distinguish
between a real ECC failure and an empty page. This is handled with a call
to nand_check_erased_ecc_chunk() which looks at the data and counts the
number of bits which are not 'ones'. If we get less zeros than the ECC
strength, we assume the page was erased and we are in the presence of
natural bitflips. Otherwise, if we are above, we assume some data was
written and the ECC engine could not recover it all, so we report an ECC
failure.
In order for this logic to be as close as the reality as we can (this is
already a simplified condition but we can hardly be more precise), we
should check all the data that is covered by the ECC step not only the
in-band data, so we should also include the ECC syndrome in the check.
Fixes:
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.
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.