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 --- fs/fuse/args.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 fs/fuse/args.h (limited to 'fs/fuse/args.h') diff --git a/fs/fuse/args.h b/fs/fuse/args.h new file mode 100644 index 000000000..5173264a1 --- /dev/null +++ b/fs/fuse/args.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _FS_FUSE_ARGS_H +#define _FS_FUSE_ARGS_H + +#include + +struct fuse_mount; + +/** One input argument of a request */ +struct fuse_in_arg { + unsigned size; + const void *value; +}; + +/** One output argument of a request */ +struct fuse_arg { + unsigned size; + void *value; +}; + +struct fuse_args { + u64 nodeid; + u32 opcode; + u32 uid; + u32 gid; + u32 pid; + u8 in_numargs; + u8 out_numargs; + u8 ext_idx; + bool force:1; + bool noreply:1; + bool nocreds:1; + bool in_pages:1; + bool out_pages:1; + bool user_pages:1; + bool out_argvar:1; + bool page_zeroing:1; + bool page_replace:1; + bool may_block:1; + bool is_ext:1; + bool is_pinned:1; + bool invalidate_vmap:1; + bool abort_on_kill:1; + /* server requested io-uring zero-copy for this op */ + bool zero_copy:1; + struct fuse_in_arg in_args[4]; + struct fuse_arg out_args[2]; + void (*end)(struct fuse_args *args, int error); + /* Used for kvec iter backed by vmalloc address */ + void *vmap_base; +}; + +/** FUSE folio descriptor */ +struct fuse_folio_desc { + unsigned int length; + unsigned int offset; +}; + +struct fuse_args_pages { + struct fuse_args args; + struct folio **folios; + struct fuse_folio_desc *descs; + unsigned int num_folios; +}; + +#endif /* _FS_FUSE_ARGS_H */ -- cgit v1.3.1