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 --- include/trace/events/erofs.h | 215 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 215 insertions(+) create mode 100644 include/trace/events/erofs.h (limited to 'include/trace/events/erofs.h') diff --git a/include/trace/events/erofs.h b/include/trace/events/erofs.h new file mode 100644 index 000000000..0a178cb10 --- /dev/null +++ b/include/trace/events/erofs.h @@ -0,0 +1,215 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM erofs + +#if !defined(_TRACE_EROFS_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_EROFS_H + +#include +#include + +struct erofs_map_blocks; + +#define show_dev(dev) MAJOR(dev), MINOR(dev) +#define show_dev_nid(entry) show_dev(entry->dev), entry->nid + +#define show_file_type(type) \ + __print_symbolic(type, \ + { 0, "FILE" }, \ + { 1, "DIR" }) + +#define show_map_flags(flags) __print_flags(flags, "|", \ + { EROFS_GET_BLOCKS_FIEMAP, "FIEMAP" }, \ + { EROFS_GET_BLOCKS_READMORE, "READMORE" }, \ + { EROFS_GET_BLOCKS_FINDTAIL, "FINDTAIL" }) + +#define show_mflags(flags) __print_flags(flags, "", \ + { EROFS_MAP_MAPPED, "M" }, \ + { EROFS_MAP_META, "I" }, \ + { EROFS_MAP_PARTIAL_MAPPED, "T" }, \ + { EROFS_MAP_PARTIAL_REF, "P" }, \ + { EROFS_MAP_FRAGMENT, "R" }) + +TRACE_EVENT(erofs_lookup, + + TP_PROTO(struct inode *dir, struct dentry *dentry, unsigned int flags), + + TP_ARGS(dir, dentry, flags), + + TP_STRUCT__entry( + __field(dev_t, dev ) + __field(erofs_nid_t, nid ) + __string(name, dentry->d_name.name ) + __field(unsigned int, flags ) + ), + + TP_fast_assign( + __entry->dev = dir->i_sb->s_dev; + __entry->nid = EROFS_I(dir)->nid; + __assign_str(name); + __entry->flags = flags; + ), + + TP_printk("dev = (%d,%d), pnid = %llu, name:%s, flags:%x", + show_dev_nid(__entry), + __get_str(name), + __entry->flags) +); + +TRACE_EVENT(erofs_fill_inode, + TP_PROTO(struct inode *inode), + TP_ARGS(inode), + + TP_STRUCT__entry( + __field(dev_t, dev ) + __field(erofs_nid_t, nid ) + __field(erofs_blk_t, blkaddr ) + __field(unsigned int, ofs ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->nid = EROFS_I(inode)->nid; + __entry->blkaddr = erofs_blknr(inode->i_sb, erofs_iloc(inode)); + __entry->ofs = erofs_blkoff(inode->i_sb, erofs_iloc(inode)); + ), + + TP_printk("dev = (%d,%d), nid = %llu, blkaddr %llu ofs %u", + show_dev_nid(__entry), + __entry->blkaddr, __entry->ofs) +); + +TRACE_EVENT(erofs_read_folio, + + TP_PROTO(struct inode *inode, struct folio *folio, bool raw), + + TP_ARGS(inode, folio, raw), + + TP_STRUCT__entry( + __field(dev_t, dev ) + __field(erofs_nid_t, nid ) + __field(int, dir ) + __field(pgoff_t, index ) + __field(unsigned int, order ) + __field(bool, raw ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->nid = EROFS_I(inode)->nid; + __entry->dir = S_ISDIR(inode->i_mode); + __entry->index = folio->index; + __entry->order = folio_order(folio); + __entry->raw = raw; + ), + + TP_printk("dev = (%d,%d), nid = %llu, %s, index = %lu, order = %u, raw = %d", + show_dev_nid(__entry), + show_file_type(__entry->dir), + (unsigned long)__entry->index, + __entry->order, + __entry->raw) +); + +TRACE_EVENT(erofs_readahead, + + TP_PROTO(struct inode *inode, pgoff_t start, unsigned int nrpage, + bool raw), + + TP_ARGS(inode, start, nrpage, raw), + + TP_STRUCT__entry( + __field(dev_t, dev ) + __field(erofs_nid_t, nid ) + __field(pgoff_t, start ) + __field(unsigned int, nrpage ) + __field(bool, raw ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->nid = EROFS_I(inode)->nid; + __entry->start = start; + __entry->nrpage = nrpage; + __entry->raw = raw; + ), + + TP_printk("dev = (%d,%d), nid = %llu, start = %lu nrpage = %u raw = %d", + show_dev_nid(__entry), + (unsigned long)__entry->start, + __entry->nrpage, + __entry->raw) +); + +TRACE_EVENT(erofs_map_blocks_enter, + + TP_PROTO(struct inode *inode, struct erofs_map_blocks *map, + unsigned int flags), + + TP_ARGS(inode, map, flags), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( erofs_nid_t, nid ) + __field( erofs_off_t, la ) + __field( u64, llen ) + __field( unsigned int, flags ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->nid = EROFS_I(inode)->nid; + __entry->la = map->m_la; + __entry->llen = map->m_llen; + __entry->flags = flags; + ), + + TP_printk("dev = (%d,%d), nid = %llu, la %llu llen %llu flags %s", + show_dev_nid(__entry), + __entry->la, __entry->llen, + __entry->flags ? show_map_flags(__entry->flags) : "NULL") +); + +TRACE_EVENT(erofs_map_blocks_exit, + + TP_PROTO(struct inode *inode, struct erofs_map_blocks *map, + unsigned int flags, int ret), + + TP_ARGS(inode, map, flags, ret), + + TP_STRUCT__entry( + __field( dev_t, dev ) + __field( erofs_nid_t, nid ) + __field( unsigned int, flags ) + __field( erofs_off_t, la ) + __field( erofs_off_t, pa ) + __field( u64, llen ) + __field( u64, plen ) + __field( unsigned int, mflags ) + __field( int, ret ) + ), + + TP_fast_assign( + __entry->dev = inode->i_sb->s_dev; + __entry->nid = EROFS_I(inode)->nid; + __entry->flags = flags; + __entry->la = map->m_la; + __entry->pa = map->m_pa; + __entry->llen = map->m_llen; + __entry->plen = map->m_plen; + __entry->mflags = map->m_flags; + __entry->ret = ret; + ), + + TP_printk("dev = (%d,%d), nid = %llu, flags %s " + "la %llu pa %llu llen %llu plen %llu mflags %s ret %d", + show_dev_nid(__entry), + __entry->flags ? show_map_flags(__entry->flags) : "NULL", + __entry->la, __entry->pa, __entry->llen, __entry->plen, + show_mflags(__entry->mflags), __entry->ret) +); + +#endif /* _TRACE_EROFS_H */ + + /* This part must be outside protection */ +#include -- cgit v1.3.1