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c21c8e1e43
ethtool first calls .get_dump_flags() to get the dump length. For coredump, the driver calls the FW to get the coredump length (L1). The min. of L1 and the user specified length is then passed to .get_dump_data() (L2) to get the coredump. The actual coredump length retrieved by the FW (L3) during .get_dump_data() may be smaller than L1. This length discrepancy will trigger a WARN_ON() in ethtool_get_dump_data(). ethtool has already vzalloc'ed a buffer with size L1. Just report the coredump length as L2 even though the actual coredump length L3 may be smaller. The extra zero padding does not matter. This will prevent the warning that may alarm the user. For correctness, only do the final length update if there is no error. Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com> Reviewed-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com> Signed-off-by: Shruti Parab <shruti.parab@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Link: https://patch.msgid.link/20250417172448.1206107-3-michael.chan@broadcom.com Signed-off-by: Jakub Kicinski <kuba@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 reStructuredText 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.