diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 8153d62..e947227 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -540,11 +540,13 @@ static void ar_context_link_page(struct ar_context *ctx, unsigned int index)
 
 static void ar_context_release(struct ar_context *ctx)
 {
-	struct device *dev = ctx->ohci->card.device;
+	struct device *dev;
 
 	if (!ctx->buffer)
 		return;
 
+	dev = ctx->ohci->card.device;
+
 	for (int i = 0; i < AR_BUFFERS; ++i) {
 		dma_addr_t dma_addr = ctx->dma_addrs[i];
 		if (dma_addr)