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We need to increment i_fastreg_wrs before we bail out from rds_ib_post_reg_frmr(). We have a fixed budget of how many FRWR operations that can be outstanding using the dedicated QP used for memory registrations and de-registrations. This budget is enforced by the atomic_t i_fastreg_wrs. If we bail out early in rds_ib_post_reg_frmr(), we will "leak" the possibility of posting an FRWR operation, and if that accumulates, no FRWR operation can be carried out. Fixes:1659185fb4("RDS: IB: Support Fastreg MR (FRMR) memory registration mode") Fixes:3a2886cca7("net/rds: Keep track of and wait for FRWR segments in use upon shutdown") Cc: stable@vger.kernel.org Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com> Reviewed-by: Allison Henderson <allison.henderson@oracle.com> Link: https://patch.msgid.link/20250911133336.451212-1-haakon.bugge@oracle.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.