Re: [PATCH 2/4] USB: XHCI: mark no_sg_limit

Sarah Sharp
2013-07-31T16:40:27Z

On Wed, Jul 31, 2013 at 06:51:47PM +0800, Ming Lei wrote:
> This patch marks all xHCI controllers as no_sg_limit since
> xHCI supports building packet from discontinuous buffers.
>
> Cc: Sarah Sharp <sarah.a.sharp@linux.intel.com>
> Signed-off-by: Ming Lei <ming.lei@canonical.com>

Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>

> ---
> drivers/usb/host/xhci.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
> index 2c49f00..541b155 100644
> --- a/drivers/usb/host/xhci.c
> +++ b/drivers/usb/host/xhci.c
> @@ -4841,6 +4841,10 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
>
> /* Accept arbitrarily long scatter-gather lists */
> hcd->self.sg_tablesize = ~0;
> +
> + /* support to build packet from discontinuous buffers */
> + hcd->self.no_sg_limit = 1;
> +
> /* XHCI controllers don't stop the ep queue on short packets :| */
> hcd->self.no_stop_on_short = 1;
>
> --
> 1.7.9.5
>
> --
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