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 --- net/mac80211/debugfs_netdev.h | 45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 net/mac80211/debugfs_netdev.h (limited to 'net/mac80211/debugfs_netdev.h') diff --git a/net/mac80211/debugfs_netdev.h b/net/mac80211/debugfs_netdev.h new file mode 100644 index 000000000..a02ec0a41 --- /dev/null +++ b/net/mac80211/debugfs_netdev.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Portions: + * Copyright (C) 2023 Intel Corporation + */ +/* routines exported for debugfs handling */ + +#ifndef __IEEE80211_DEBUGFS_NETDEV_H +#define __IEEE80211_DEBUGFS_NETDEV_H + +#include "ieee80211_i.h" + +#ifdef CONFIG_MAC80211_DEBUGFS +void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata); +void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata); +void ieee80211_debugfs_recreate_netdev(struct ieee80211_sub_if_data *sdata, + bool mld_vif); + +void ieee80211_link_debugfs_add(struct ieee80211_link_data *link); +void ieee80211_link_debugfs_remove(struct ieee80211_link_data *link); + +void ieee80211_link_debugfs_drv_add(struct ieee80211_link_data *link); +void ieee80211_link_debugfs_drv_remove(struct ieee80211_link_data *link); +#else +static inline void ieee80211_debugfs_remove_netdev( + struct ieee80211_sub_if_data *sdata) +{} +static inline void ieee80211_debugfs_rename_netdev( + struct ieee80211_sub_if_data *sdata) +{} +static inline void ieee80211_debugfs_recreate_netdev( + struct ieee80211_sub_if_data *sdata, bool mld_vif) +{} +static inline void ieee80211_link_debugfs_add(struct ieee80211_link_data *link) +{} +static inline void ieee80211_link_debugfs_remove(struct ieee80211_link_data *link) +{} + +static inline void ieee80211_link_debugfs_drv_add(struct ieee80211_link_data *link) +{} +static inline void ieee80211_link_debugfs_drv_remove(struct ieee80211_link_data *link) +{} +#endif + +#endif /* __IEEE80211_DEBUGFS_NETDEV_H */ -- cgit v1.3.1