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-rw-r--r--drivers/firewire/sbp2.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c
index 7aef911fdc71..c7fc78c23978 100644
--- a/drivers/firewire/sbp2.c
+++ b/drivers/firewire/sbp2.c
@@ -689,14 +689,12 @@ static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
{
- /*
- * We may access dont_block without taking card->lock here:
- * All callers of sbp2_allow_block() and all callers of sbp2_unblock()
- * are currently serialized against each other.
- * And a wrong result in sbp2_conditionally_block()'s access of
- * dont_block is rather harmless, it simply misses its first chance.
- */
- --lu->tgt->dont_block;
+ struct sbp2_target *tgt = lu->tgt;
+ struct fw_card *card = target_parent_device(tgt)->card;
+
+ spin_lock_irq(&card->lock);
+ --tgt->dont_block;
+ spin_unlock_irq(&card->lock);
}
/*

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