usb:udc:samsung: Remove redundant cache operation from Samsung UDC driver

[platform/kernel/u-boot.git] / drivers / usb / gadget / s3c_udc_otg_xfer_dma.c

diff --git a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
index 1cbf8f6..cbc8734 100644 (file)
--- a/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
+++ b/drivers/usb/gadget/s3c_udc_otg_xfer_dma.c
@@ -29,10 +29,6 @@ static inline void s3c_udc_ep0_zlp(struct s3c_udc *dev)
 {
        u32 ep_ctrl;
 
-       flush_dcache_range((unsigned long) usb_ctrl_dma_addr,
-                          (unsigned long) usb_ctrl_dma_addr
-                          + DMA_BUFFER_SIZE);
-
        writel(usb_ctrl_dma_addr, &reg->in_endp[EP0_CON].diepdma);
        writel(DIEPT_SIZ_PKT_CNT(1), &reg->in_endp[EP0_CON].dieptsiz);
 
@@ -52,10 +48,6 @@ void s3c_udc_pre_setup(void)
        debug_cond(DEBUG_IN_EP,
                   "%s : Prepare Setup packets.\n", __func__);
 
-       invalidate_dcache_range((unsigned long) usb_ctrl_dma_addr,
-                               (unsigned long) usb_ctrl_dma_addr
-                               + DMA_BUFFER_SIZE);
-
        writel(DOEPT_SIZ_PKT_CNT(1) | sizeof(struct usb_ctrlrequest),
               &reg->out_endp[EP0_CON].doeptsiz);
        writel(usb_ctrl_dma_addr, &reg->out_endp[EP0_CON].doepdma);
@@ -82,10 +74,6 @@ static inline void s3c_ep0_complete_out(void)
        debug_cond(DEBUG_IN_EP,
                "%s : Prepare Complete Out packet.\n", __func__);
 
-       invalidate_dcache_range((unsigned long) usb_ctrl_dma_addr,
-                               (unsigned long) usb_ctrl_dma_addr
-                               + DMA_BUFFER_SIZE);
-
        writel(DOEPT_SIZ_PKT_CNT(1) | sizeof(struct usb_ctrlrequest),
               &reg->out_endp[EP0_CON].doeptsiz);
        writel(usb_ctrl_dma_addr, &reg->out_endp[EP0_CON].doepdma);
@@ -115,11 +103,6 @@ static int setdma_rx(struct s3c_ep *ep, struct s3c_request *req)
        ep->len = length;
        ep->dma_buf = buf;
 
-       invalidate_dcache_range((unsigned long) ep->dev->dma_buf[ep_num],
-                               (unsigned long) ep->dev->dma_buf[ep_num]
-                               + ROUND(ep->ep.maxpacket,
-                                       CONFIG_SYS_CACHELINE_SIZE));
-
        if (length == 0)
                pktcnt = 1;
        else