The s3c udc driver sends data in a max packet size. Therefore the dcache invalidate range shall be equal to max packet, not the entire DMA_BUFFER_SIZE.
Signed-off-by: Lukasz Majewski l.majewski@samsung.com Cc: Marek Vasut marex@denx.de
--- Changes for v2: - ROUND the maxpacket value to invalidate data smaller than cache line size
drivers/usb/gadget/s3c_udc_otg_xfer_dma.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c index d7af5e9..1cbf8f6 100644 --- a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c +++ b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c @@ -117,7 +117,8 @@ static int setdma_rx(struct s3c_ep *ep, struct s3c_request *req)
invalidate_dcache_range((unsigned long) ep->dev->dma_buf[ep_num], (unsigned long) ep->dev->dma_buf[ep_num] - + DMA_BUFFER_SIZE); + + ROUND(ep->ep.maxpacket, + CONFIG_SYS_CACHELINE_SIZE));
if (length == 0) pktcnt = 1;