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We need the back lock when freeing a task, so we hold it when calling __iscsi_put_task() from the completion path to make it easier and to avoid having to retake it in that path. For iscsi_put_task() we just grabbed it while also doing the decrement on the refcount but it's only really needed if the refcount is zero and we free the task. This modifies iscsi_put_task() to just take the lock when needed then has the xmit path use it. Normally we will then not take the back lock from the xmit path. It will only be rare cases where the network is so fast that we get a response right after we send the header/data. Link: https://lore.kernel.org/r/20220616224557.115234-9-michael.christie@oracle.com Reviewed-by: Lee Duncan <lduncan@suse.com> Signed-off-by: Mike Christie <michael.christie@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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.