[U-Boot] [PATCH v2 01/10] usb:udc:s3c: Reduce dcache invalidate range for UDC receive buffer

[Lukasz Majewski]

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 at samsung.com>
Cc: Marek Vasut <marex at 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;
-- 
1.7.10.4