usb: gadget: mv_u3d: add check for dma mapping error

[linux-2.6-block.git] / drivers / usb / gadget / udc / mv_u3d_core.c

diff --git a/drivers/usb/gadget/udc/mv_u3d_core.c b/drivers/usb/gadget/udc/mv_u3d_core.c
index b9e19a5913224be4fca62cbc03d93de1cb4c2701..6f3be0ba9ac8176438a9251b56e0a405a7876f3f 100644 (file)
--- a/drivers/usb/gadget/udc/mv_u3d_core.c
+++ b/drivers/usb/gadget/udc/mv_u3d_core.c
@@ -462,6 +462,12 @@ static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
                                        req->trb_head->trb_hw,
                                        trb_num * sizeof(*trb_hw),
                                        DMA_BIDIRECTIONAL);
+               if (dma_mapping_error(u3d->gadget.dev.parent,
+                                       req->trb_head->trb_dma)) {
+                       kfree(req->trb_head->trb_hw);
+                       kfree(req->trb_head);
+                       return -EFAULT;
+               }
 
                req->chain = 1;
        }