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

Message ID 1381235446-31477-2-git-send-email-l.majewski@samsung.com
State Awaiting Upstream
Delegated to: Marek Vasut
Headers show

Commit Message

Łukasz Majewski Oct. 8, 2013, 12:30 p.m. UTC 
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(-)
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Patch

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;