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[ Upstream commitfc3325701a] reg_pages should always contain mr->npage since when the mr is finally de-reg'd it is always subtracted out. If there were any error exits then mlx5_ib_rereg_user_mr() would leave the reg_pages adjusted and this will cause it to be double subtracted eventually. The manipulation of reg_pages is inherently connected to the umem, so lift it out of set_mr_fields() and only adjust it around creating/destroying a umem. reg_pages is only used for diagnostics in sysfs. Fixes:7d0cc6edcc("IB/mlx5: Add MR cache for large UMR regions") Link: https://lore.kernel.org/r/20201026131936.1335664-3-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> 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.
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.