usb:udc:s3c: Reduce dcache invalidate range for UDC receive buffer

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.

Change-Id: I60a08c3365cf5f43ad3dcef3baed940337d250ef
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>

diff --git a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
index 64102f09cd93b397052447a104feec06fd9e5d1c..8f46284e717d563844ce9df7e365fc71ecc03c23 100644 (file)
--- a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
+++ b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
@@ -130,7 +130,8 @@ 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;