Dear 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@samsung.com Cc: Marek Vasut marex@denx.de
drivers/usb/gadget/s3c_udc_otg_xfer_dma.c | 2 +- 1 file changed, 1 insertion(+), 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..5e3ba76 100644 --- a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c +++ b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c @@ -117,7 +117,7 @@ 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);
+ ep->ep.maxpacket);
Is this maxpacket _always_ multiple of cacheline big or will you need some ROUND_UP() call here ?
Best regards, Marek Vasut