On Fri, Aug 23, 2013 at 11:15:10AM +0300, Xenia Ragiadakou wrote:
> This patch refactors the code in TRB_CONFIG_EP switch case, in
> handle_cmd_completion(), into a fuction named xhci_handle_cmd_config_ep().
>
> There were added two additional variables, 'add_flags' and 'drop_flags',
> to reduce line length below 80 chars and improve code readability.
Much better, thanks! Only one thing...
> Signed-off-by: Xenia Ragiadakou <burzalod...@gmail.com>
> ---
> drivers/usb/host/xhci-ring.c | 112
> +++++++++++++++++++++++--------------------
> 1 file changed, 60 insertions(+), 52 deletions(-)
>
> diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
> index beeee96..7103bd9 100644
> --- a/drivers/usb/host/xhci-ring.c
> +++ b/drivers/usb/host/xhci-ring.c
> @@ -1393,6 +1393,64 @@ static void xhci_handle_cmd_disable_slot(struct
> xhci_hcd *xhci, int slot_id)
> xhci_free_virt_device(xhci, slot_id);
> }
>
> +static void xhci_handle_cmd_config_ep(struct xhci_hcd *xhci, int slot_id,
> + struct xhci_event_cmd *event, u32 cmd_comp_code)
> +{
> + struct xhci_virt_device *virt_dev;
> + struct xhci_input_control_ctx *ctrl_ctx;
> + unsigned int ep_index;
> + unsigned int ep_state;
> + u32 add_flags, drop_flags;
> +
> + virt_dev = xhci->devs[slot_id];
> + if (handle_cmd_in_cmd_wait_list(xhci, virt_dev, event))
> + return;
> + /*
> + * Configure endpoint commands can come from the USB core
> + * configuration or alt setting changes, or because the HW
> + * needed an extra configure endpoint command after a reset
> + * endpoint command or streams were being configured.
> + * If the command was for a halted endpoint, the xHCI driver
> + * is not waiting on the configure endpoint command.
> + */
> + ctrl_ctx = xhci_get_input_control_ctx(xhci, virt_dev->in_ctx);
> + if (!ctrl_ctx) {
> + xhci_warn(xhci, "Could not get input context, bad type.\n");
> + return;
> + }
Can you add an extra newline here for readibility?
> + add_flags = le32_to_cpu(ctrl_ctx->add_flags);
> + drop_flags = le32_to_cpu(ctrl_ctx->drop_flags);
> + /* Input ctx add_flags are the endpoint index plus one */
> + ep_index = xhci_last_valid_endpoint(add_flags) - 1;
And here.
> + /* A usb_set_interface() call directly after clearing a halted
> + * condition may race on this quirky hardware. Not worth
> + * worrying about, since this is prototype hardware. Not sure
> + * if this will work for streams, but streams support was
> + * untested on this prototype.
> + */
> + if (xhci->quirks & XHCI_RESET_EP_QUIRK &&
> + ep_index != (unsigned int) -1 &&
> + add_flags - SLOT_FLAG == drop_flags) {
> + ep_state = virt_dev->eps[ep_index].ep_state;
> + if (!(ep_state & EP_HALTED))
> + goto bandwidth_change;
> + xhci_dbg_trace(xhci, trace_xhci_dbg_quirks,
> + "Completed config ep cmd - "
> + "last ep index = %d, state = %d",
> + ep_index, ep_state);
> + /* Clear internal halted state and restart ring(s) */
> + virt_dev->eps[ep_index].ep_state &= ~EP_HALTED;
> + ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
> + return;
> + }
Otherwise looks great!
Sarah Sharp
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