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Li Ming 03ff65c025 cxl/edac: Fix wrong dpa checking for PPR operation
Per Table 8-143. "Get Partition Info Output Payload" in CXL r3.2 section
8.2.10.9.2.1 "Get Partition Info(Opcode 4100h)", DPA 0 is a valid
address of a CXL device. However, cxl_do_ppr() considers it as an
invalid address, so that user will get an -EINVAL when user calls the
sysfs interface of the edac driver to trigger a Post Package Repair(PPR)
operation for DPA 0 on a CXL device. The correct implementation should
be checking if the input DPA is in the DPA range of the CXL device.

Fixes: be9b359e05 ("cxl/edac: Add CXL memory device soft PPR control feature")
Signed-off-by: Li Ming <ming.li@zohomail.com>
Tested-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Shiju Jose <shiju.jose@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Link: https://patch.msgid.link/20250711032357.127355-3-ming.li@zohomail.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
History 2025-07-11 09:46:53 -07:00
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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 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.