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commit 706657b1febf446a9ba37dc51b89f46604f57ee9 upstream. In order to setup its PCI component, the driver needs any node private instance in order to get a reference to the PCI device and hand that into edac_pci_create_generic_ctl(). For convenience, it uses the 0th memory controller descriptor under the assumption that if any, the 0th will be always present. However, this assumption goes wrong when the 0th node doesn't have memory and the driver doesn't initialize an instance for it: EDAC amd64: F17h detected (node 0). ... EDAC amd64: Node 0: No DIMMs detected. But looking up node instances is not really needed - all one needs is the pointer to the proper device which gets discovered during instance init. So stash that pointer into a variable and use it when setting up the EDAC PCI component. Clear that variable when the driver needs to unwind due to some instances failing init to avoid any registration imbalance. Cc: <stable@vger.kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/20201122150815.13808-1-bp@alien8.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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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.