r8152: fix runtime resume for linking change

Fix the runtime resume doesn't work normally for linking change.

1. Reset the settings and status of runtime suspend.
2. Sync the linking status.
3. Poll the linking change.
Signed-off-by: NHayes Wang <hayeswang@realtek.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/usb/r8152.c

@@ -365,8 +365,10 @@
 #define DEBUG_LTSSM		0x0082
 
 /* PLA_EXTRA_STATUS */
+#define CUR_LINK_OK		BIT(15)
 #define U3P3_CHECK_EN		BIT(7)	/* RTL_VER_05 only */
 #define LINK_CHANGE_FLAG	BIT(8)
+#define POLL_LINK_CHG		BIT(0)
 
 /* USB_USB2PHY */
 #define USB2PHY_SUSPEND		0x0001
@@ -5387,6 +5389,16 @@ static void r8153_init(struct r8152 *tp)
 		else
 			ocp_data |= DYNAMIC_BURST;
 		ocp_write_byte(tp, MCU_TYPE_USB, USB_CSR_DUMMY1, ocp_data);
+
+		r8153_queue_wake(tp, false);
+
+		ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_EXTRA_STATUS);
+		if (rtl8152_get_speed(tp) & LINK_STATUS)
+			ocp_data |= CUR_LINK_OK;
+		else
+			ocp_data &= ~CUR_LINK_OK;
+		ocp_data |= POLL_LINK_CHG;
+		ocp_write_word(tp, MCU_TYPE_PLA, PLA_EXTRA_STATUS, ocp_data);
 	}
 
 	ocp_data = ocp_read_byte(tp, MCU_TYPE_USB, USB_CSR_DUMMY2);
@@ -5416,6 +5428,7 @@ static void r8153_init(struct r8152 *tp)
 	ocp_write_word(tp, MCU_TYPE_USB, USB_CONNECT_TIMER, 0x0001);
 
 	r8153_power_cut_en(tp, false);
+	rtl_runtime_suspend_enable(tp, false);
 	r8153_u1u2en(tp, true);
 	r8153_mac_clk_spd(tp, false);
 	usb_enable_lpm(tp->udev);
@@ -5484,6 +5497,14 @@ static void r8153b_init(struct r8152 *tp)
 	r8153b_ups_en(tp, false);
 	r8153_queue_wake(tp, false);
 	rtl_runtime_suspend_enable(tp, false);
+
+	ocp_data = ocp_read_word(tp, MCU_TYPE_PLA, PLA_EXTRA_STATUS);
+	if (rtl8152_get_speed(tp) & LINK_STATUS)
+		ocp_data |= CUR_LINK_OK;
+	else
+		ocp_data &= ~CUR_LINK_OK;
+	ocp_data |= POLL_LINK_CHG;
+	ocp_write_word(tp, MCU_TYPE_PLA, PLA_EXTRA_STATUS, ocp_data);
 	r8153b_u1u2en(tp, true);
 	usb_enable_lpm(tp->udev);