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023d2a43ed
When having larger RQ sizes and small MTUs sizes, the hd_per_wq variable
can overflow. Like in the following case:
$> ethtool --set-ring eth1 rx 8192
$> ip link set dev eth1 mtu 144
$> ethtool --features eth1 rx-gro-hw on
... yields in dmesg:
mlx5_core 0000:08:00.1: mlx5_cmd_out_err:808:(pid 194797): CREATE_MKEY(0x200) op_mod(0x0) failed, status bad parameter(0x3), syndrome (0x3bf6f), err(-22)
because hd_per_wq is 64K which overflows to 0 and makes the command
fail.
This patch increases the variable size to 32 bit.
Fixes:
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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.