firewire: fw-ohci: missing dma_unmap_single

at_context_queue_packet() didn't clean up in an early exit path.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index a33374825526..ec70c9f91171 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -680,6 +680,9 @@ at_context_queue_packet(struct context *ctx, struct fw_packet *packet)
 
         /* FIXME: Document how the locking works. */
         if (ohci->generation != packet->generation) {
+                if (packet->payload_length > 0)
+                        dma_unmap_single(ohci->card.device, payload_bus,
+                                         packet->payload_length, DMA_TO_DEVICE);
                 packet->ack = RCODE_GENERATION;
                 return -1;
         }