diff options
Diffstat (limited to 'usbdrv/usbdrv.c')
| -rw-r--r-- | usbdrv/usbdrv.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/usbdrv/usbdrv.c b/usbdrv/usbdrv.c index 4917078..e6c8c19 100644 --- a/usbdrv/usbdrv.c +++ b/usbdrv/usbdrv.c @@ -449,9 +449,13 @@ usbRequest_t *rq = (void *)data; } #if USB_CFG_IMPLEMENT_FN_READ || USB_CFG_IMPLEMENT_FN_WRITE if(replyLen == USB_NO_MSG){ /* use user-supplied read/write function */ - /* do some conditioning on replyLen */ + /* do some conditioning on replyLen, but on IN transfers only */ if((rq->bmRequestType & USBRQ_DIR_MASK) != USBRQ_DIR_HOST_TO_DEVICE){ - replyLen = rq->wLength.bytes[0]; /* IN transfers only */ + if(sizeof(replyLen) < sizeof(rq->wLength.word)){ /* help compiler with optimizing */ + replyLen = rq->wLength.bytes[0]; + }else{ + replyLen = rq->wLength.word; + } } usbMsgFlags = USB_FLG_USE_USER_RW; }else /* The 'else' prevents that we limit a replyLen of USB_NO_MSG to the maximum transfer len. */ |