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[ Upstream commit 2fdbc20036acda9e5694db74a032d3c605323005 ] If pnfsd_update_layout() is called on a file for which recovery has failed it will enter a tight infinite loop. NFS_LAYOUT_INVALID_STID will be set, nfs4_select_rw_stateid() will return -EIO, and nfs4_schedule_stateid_recovery() will do nothing, so nfs4_client_recover_expired_lease() will not wait. So the code will loop indefinitely. Break the loop by testing the validity of the open stateid at the top of the loop. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.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.