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| /rk3399_rockchip-uboot/drivers/usb/gadget/ |
| H A D | dwc2_udc_otg_xfer_dma.c | 9424f1418377bfb0c95ed36a8854e7fe53436229 Thu Jul 14 06:52:35 UTC 2016 Xu Ziyuan <xzy.xu@rock-chips.com> usb: dwc2 : invalidate dcache before starting DMA
Invalidate dcache before starting the DMA to ensure coherency. In case
there are any dirty lines from the DMA buffer in the cache, subsequent
cache-line replacements may corrupt the buffer in memory while the DMA
is still going on. Cache-line replacement can happen if the CPU tries to
bring some other memory locations into the cache while the DMA is going
on.
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
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