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[ Upstream commit 37233169a6ea912020c572f870075a63293b786a ] When populating cache leaves we previously fetched the CPU device node at the very beginning. But when ACPI is enabled we go through a specific branch which returns early and does not call 'of_node_put' for the node that was acquired. Since we are not using a CPU device node for the ACPI code anyways, we can simply move the initialization of it just passed the ACPI block, and we are guaranteed to have an 'of_node_put' call for the acquired node. This prevents a bad reference count of the CPU device node. Moreover, the previous function did not check for errors when acquiring the device node, so a return -ENOENT has been added for that case. Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Reviewed-by: Sunil V L <sunilvl@ventanamicro.com> Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com> Fixes: 604f32ea6909 ("riscv: cacheinfo: initialize cacheinfo's level and type from ACPI PPTT") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20240913080053.36636-1-mikisabate@gmail.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com> Stable-dep-of: fb8179ce2996 ("riscv: cacheinfo: Use of_property_present() for non-boolean properties") 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.