XHCI: Tweak formatting of FinishTransfers logic.

No functional change intended.

src/add-ons/kernel/busses/usb/xhci.cpp

@@ -2802,8 +2802,7 @@ XHCI::FinishTransfers()
 				TRACE("transfer not successful, actualLength=%" B_PRIuSIZE "\n",
 					actualLength);
 			}
-			if (callbackStatus == B_OK) {
-				if (directionIn && actualLength > 0) {
+			if (callbackStatus == B_OK && directionIn && actualLength > 0) {
 				TRACE("copying in iov count %ld\n", transfer->VectorCount());
 				status_t status = transfer->PrepareKernelAccess();
 				if (status == B_OK) {
@@ -2813,7 +2812,6 @@ XHCI::FinishTransfers()
 					callbackStatus = status;
 				}
 			}
-			}
 			transfer->Finished(callbackStatus, actualLength);
 			delete transfer;
 			FreeDescriptor(td);