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

The transaction lock protects the list of pending transactions and the
transaction label.

Add context analysis annotations for the transaction lock. Compiler-based
context analysis has difficulty tracking the locking scope when the lock
is accessed through an indirect reference (e.g. t->card->lock), making
some functions difficult to annotate. Use lockdep assertions to cover
these cases.

Link: https://lore.kernel.org/r/20261011063146.497455-4-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index dbb5c825a1cc..89db958dea2e 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -92,9 +92,9 @@ struct fw_card {
 	u64 reset_jiffies;
 
 	struct {
-		int current_tlabel;
-		u64 tlabel_mask;
-		struct list_head list;
+		int current_tlabel __guarded_by(&lock);
+		u64 tlabel_mask __guarded_by(&lock);
+		struct list_head list __guarded_by(&lock);
 		spinlock_t lock;
 	} transactions;