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Srijit Bose f1029391e6 bnxt_en: Fix potential data corruption with HW GRO/LRO 
[ Upstream commit ffeafa65b2 ]

Fix the max number of bits passed to find_first_zero_bit() in
bnxt_alloc_agg_idx().  We were incorrectly passing the number of
long words.  find_first_zero_bit() may fail to find a zero bit and
cause a wrong ID to be used.  If the wrong ID is already in use, this
can cause data corruption.  Sometimes an error like this can also be
seen:

bnxt_en 0000:83:00.0 enp131s0np0: TPA end agg_buf 2 != expected agg_bufs 1

Fix it by passing the correct number of bits MAX_TPA_P5.  Use
DECLARE_BITMAP() to more cleanly define the bitmap.  Add a sanity
check to warn if a bit cannot be found and reset the ring [MChan].

Fixes: ec4d8e7cf0 ("bnxt_en: Add TPA ID mapping logic for 57500 chips.")
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Srijit Bose <srijit.bose@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20251231083625.3911652-1-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-01-17 16:31:23 +01:00
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README

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 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.