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 --- tools/perf/util/sample-raw.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 tools/perf/util/sample-raw.h (limited to 'tools/perf/util/sample-raw.h') diff --git a/tools/perf/util/sample-raw.h b/tools/perf/util/sample-raw.h new file mode 100644 index 000000000..c8d38c841 --- /dev/null +++ b/tools/perf/util/sample-raw.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __SAMPLE_RAW_H +#define __SAMPLE_RAW_H 1 + +#include + +struct evlist; +struct perf_env; +union perf_event; +struct perf_sample; + +void evlist__s390_sample_raw(struct evlist *evlist, union perf_event *event, + struct perf_sample *sample); +bool evlist__has_amd_ibs(struct evlist *evlist); +void evlist__amd_sample_raw(struct evlist *evlist, union perf_event *event, + struct perf_sample *sample); +void evlist__init_trace_event_sample_raw(struct evlist *evlist, struct perf_env *env); + +#endif /* __SAMPLE_RAW_H */ -- cgit v1.3.1