[PATCH net 1/2] r8152: add pre_reset and post_reset

Hayes Wang
2015-07-28T07:35:11Z

Add rtl8152_pre_reset() and rtl8152_post_reset() which are used when
calling usb_reset_device(). The two functions could reduce the time
of reset when calling usb_reset_device() after probe().

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
---
drivers/net/usb/r8152.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 68 insertions(+)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 144dc64..a6caa60 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -3342,6 +3342,72 @@ static void r8153_init(struct r8152 *tp)
r8153_u2p3en(tp, true);
}

+static int rtl8152_pre_reset(struct usb_interface *intf)
+{
+ struct r8152 *tp = usb_get_intfdata(intf);
+ struct net_device *netdev;
+ int ret;
+
+ if (intf->condition != USB_INTERFACE_BOUND || !tp)
+ return 0;
+
+ netdev = tp->netdev;
+ if (!netif_running(netdev))
+ return 0;
+
+ ret = usb_autopm_get_interface(intf);
+ if (ret < 0)
+ return ret;
+
+ napi_disable(&tp->napi);
+ clear_bit(WORK_ENABLE, &tp->flags);
+ usb_kill_urb(tp->intr_urb);
+ cancel_delayed_work_sync(&tp->schedule);
+ if (netif_carrier_ok(netdev)) {
+ netif_stop_queue(netdev);
+ mutex_lock(&tp->control);
+ tp->rtl_ops.disable(tp);
+ mutex_unlock(&tp->control);
+ }
+
+ usb_autopm_put_interface(intf);
+
+ return 0;
+}
+
+static int rtl8152_post_reset(struct usb_interface *intf)
+{
+ struct r8152 *tp = usb_get_intfdata(intf);
+ struct net_device *netdev;
+ int ret;
+
+ if (intf->condition != USB_INTERFACE_BOUND || !tp)
+ return 0;
+
+ netdev = tp->netdev;
+ if (!netif_running(netdev))
+ return 0;
+
+ ret = usb_autopm_get_interface(intf);
+ if (ret < 0)
+ return ret;
+
+ set_bit(WORK_ENABLE, &tp->flags);
+ if (netif_carrier_ok(netdev)) {
+ mutex_lock(&tp->control);
+ tp->rtl_ops.enable(tp);
+ rtl8152_set_rx_mode(netdev);
+ mutex_unlock(&tp->control);
+ netif_wake_queue(netdev);
+ }
+
+ napi_enable(&tp->napi);
+
+ usb_autopm_put_interface(intf);
+
+ return ret;
+}
+
static int rtl8152_suspend(struct usb_interface *intf, pm_message_t message)
{
struct r8152 *tp = usb_get_intfdata(intf);
@@ -4164,6 +4230,8 @@ static struct usb_driver rtl8152_driver = {
.suspend = rtl8152_suspend,
.resume = rtl8152_resume,
.reset_resume = rtl8152_resume,
+ .pre_reset = rtl8152_pre_reset,
+ .post_reset = rtl8152_post_reset,
.supports_autosuspend = 1,
.disable_hub_initiated_lpm = 1,
};
--
2.4.2