github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-11-06 21:58:01 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

firewire: core: use context analysis annotations and lockdep checks for topology map lock

Browse Source 
The spinlock protects the topology map from concurrent access.

Add context analysis annotations and lockdep checks for this lock.

Link: https://lore.kernel.org/r/20261011063146.497455-6-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2026-10-11 15:31:45 +09:00
parent 8540ec31c8
commit c2b3fb6326
3 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/firewire/core-topology.c
View File

@ -474,9 +474,12 @@ static void update_topology_map(__be32 *buffer, size_t buffer_size, int root_nod
void fw_core_handle_bus_reset(struct fw_card *card, int node_id, int generation,
int self_id_count, u32 *self_ids, bool bm_abdicate)
__must_not_hold(&card->topology_map.lock)
{
struct fw_node *local_node;
lockdep_assert_not_held(&card->topology_map.lock);
trace_bus_reset_handle(card->index, generation, node_id, bm_abdicate, self_ids, self_id_count);
scoped_guard(spinlock, &card->lock) {

3
drivers/firewire/core-transaction.c
View File

@ -1290,9 +1290,12 @@ static void handle_topology_map(struct fw_card *card, struct fw_request *request
int tcode, int destination, int source, int generation,
unsigned long long offset, void *payload, size_t length,
void *callback_data)
__must_not_hold(&card->topology_map.lock)
{
int start;
lockdep_assert_not_held(&card->topology_map.lock);
if (!tcode_is_read_request(tcode)) {
fw_send_response(card, request, RCODE_TYPE_ERROR);
return;

2
include/linux/firewire.h
View File

@ -139,7 +139,7 @@ struct fw_card {
u32 broadcast_channel;
struct {
__be32 buffer[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
__be32 buffer[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4] __guarded_by(&lock);
spinlock_t lock;
} topology_map;