diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 3f59d1df6504d8af232bc30756ea135113db7761..2e4b425847a77bfdc4f1b04975f259a79b809aca 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -2309,6 +2309,7 @@ static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
 	free_page((unsigned long)ctx->header);
  out:
 	spin_lock_irqsave(&ohci->lock, flags);
+	*channels |= 1ULL << channel;
 	*mask |= 1 << index;
 	spin_unlock_irqrestore(&ohci->lock, flags);