On 1/4/19 10:56 AM, Ye Li wrote:
> After updating the value of dev_context_ptrs[0], we should flush this
> from cache to memory. Otherwise the xhci controller won't use it.
>
> Signed-off-by: Ye Li <[email protected]>
> ---
> drivers/usb/host/xhci-mem.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
> index 04ab540..0f34522 100644
> --- a/drivers/usb/host/xhci-mem.c
> +++ b/drivers/usb/host/xhci-mem.c
> @@ -369,6 +369,8 @@ static int xhci_scratchpad_alloc(struct xhci_ctrl *ctrl)
> ctrl->dcbaa->dev_context_ptrs[0] =
> cpu_to_le64((uintptr_t)scratchpad->sp_array);
>
> + xhci_flush_cache((uintptr_t)&ctrl->dcbaa->dev_context_ptrs[0],
> sizeof(__le64));
Don't you want to use some sizeof(ctrl->dcbaa->dev_context_ptrs[0])
instead of sizeof(__le64) here ?
btw Bin, A-B/R-B please.
> +
> page_size = xhci_readl(&hcor->or_pagesize) & 0xffff;
> for (i = 0; i < 16; i++) {
> if ((0x1 & page_size) != 0)
>
--
Best regards,
Marek Vasut
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