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 --- rust/helpers/binder.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 rust/helpers/binder.c (limited to 'rust/helpers/binder.c') diff --git a/rust/helpers/binder.c b/rust/helpers/binder.c new file mode 100644 index 000000000..a2327f1b3 --- /dev/null +++ b/rust/helpers/binder.c @@ -0,0 +1,27 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Copyright (C) 2025 Google LLC. + */ + +#include +#include + +__rust_helper unsigned long rust_helper_list_lru_count(struct list_lru *lru) +{ + return list_lru_count(lru); +} + +__rust_helper unsigned long rust_helper_list_lru_walk(struct list_lru *lru, + list_lru_walk_cb isolate, + void *cb_arg, + unsigned long nr_to_walk) +{ + return list_lru_walk(lru, isolate, cb_arg, nr_to_walk); +} + +__rust_helper void rust_helper_init_task_work(struct callback_head *twork, + task_work_func_t func) +{ + init_task_work(twork, func); +} -- cgit v1.3.1