From 27600805e62f800bacf990354632eae4e487d34c Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Thu, 3 Sep 2026 10:43:25 -0500 Subject: x86/amd_node: Fix PCI device reference counting in amd_smn_init() The local "root" pointer is a temporary variable used during the device search. Therefore, refcount related to the search iterators should be cleaned up after the search is complete. Use the __free() cleanup macro to ensure the refcount is decremented when the temporary pointer goes out of scope. Additionally, increment the refcount when caching a root pointer. This ensures the in-use refcount is separate from the temporary search refcounting. Finally, drop the redundant "root = NULL" before the second search loop. The pci_get_class() iterator always decrements the refcount of its "from" argument, so the first loop can only fall through with "root" already NULL. Fixes: 0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching") Closes: https://sashiko.dev/#/patchset/20260806160159.230453-1-jason.andryuk%40amd.com Reported-by: Sashiko Assisted-by: LLM Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Mario Limonciello (AMD) Cc: Link: https://patch.msgid.link/20260903154325.74343-1-yazen.ghannam@amd.com --- Documentation/devicetree/kernel-api.rst | 57 +++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 Documentation/devicetree/kernel-api.rst (limited to 'Documentation/devicetree/kernel-api.rst') diff --git a/Documentation/devicetree/kernel-api.rst b/Documentation/devicetree/kernel-api.rst new file mode 100644 index 000000000..b7429e6ed --- /dev/null +++ b/Documentation/devicetree/kernel-api.rst @@ -0,0 +1,57 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. _devicetree: + +====================================== +DeviceTree Kernel API +====================================== + +Core functions +-------------- + +.. kernel-doc:: drivers/of/base.c + :export: + +.. kernel-doc:: include/linux/of.h + :internal: + +.. kernel-doc:: drivers/of/property.c + :export: + +.. kernel-doc:: include/linux/of_graph.h + :internal: + +.. kernel-doc:: drivers/of/address.c + :export: + +.. kernel-doc:: drivers/of/irq.c + :export: + +.. kernel-doc:: drivers/of/fdt.c + :export: + +Driver model functions +---------------------- + +.. kernel-doc:: include/linux/of_device.h + :internal: + +.. kernel-doc:: drivers/of/device.c + :export: + +.. kernel-doc:: include/linux/of_platform.h + :internal: + +.. kernel-doc:: drivers/of/platform.c + :export: + +Overlay and Dynamic DT functions +-------------------------------- + +.. kernel-doc:: drivers/of/resolver.c + :export: + +.. kernel-doc:: drivers/of/dynamic.c + :export: + +.. kernel-doc:: drivers/of/overlay.c + :export: -- cgit v1.3.1