Re: [U-Boot] [PATCH] usb: dwc2: Align size of invalidating dcache before starting DMA

[Łukasz Majewski]

Hi Seung-Woo,

During using dwc2 usb gadget, if usb message size is too small,
following cache misaligned warning is shown:

   CACHE: Misaligned operation at range [bfdbcb00, bfdbcb04]

Align size of invalidating dcache before starting DMA to remove the
warning.

Signed-off-by: Seung-Woo Kim <sw0312....@samsung.com>
---
 drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c 
b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
index 0d6d2fb..b6164af 100644
--- a/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
+++ b/drivers/usb/gadget/dwc2_udc_otg_xfer_dma.c
@@ -111,7 +111,8 @@ static int setdma_rx(struct dwc2_ep *ep, struct 
dwc2_request *req)
        ctrl =  readl(&reg->out_endp[ep_num].doepctl);

        invalidate_dcache_range((unsigned long) ep->dma_buf,
-                               (unsigned long) ep->dma_buf + ep->len);
+                               (unsigned long) ep->dma_buf +
+                               ROUND(ep->len, CONFIG_SYS_CACHELINE_SIZE));

        writel((unsigned int) ep->dma_buf, &reg->out_endp[ep_num].doepdma);
        writel(DOEPT_SIZ_PKT_CNT(pktcnt) | DOEPT_SIZ_XFER_SIZE(length),

Reviewed-by: Łukasz Majewski <lu...@denx.de>

--
Best regards,

Lukasz Majewski

--

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