【问题描述】
计算机概率性待机唤醒后网络异常,系统唤醒后网络异常现象描述如下:
1) 如果系统网络使用的是DHCP方式，则系统无法获取到ip地址.
2) 如果系统使用的是静态ip地址，则系统无法ping通外部,外部也没法ping通内部.
3) 故障时down掉网卡再up,网络功能恢复正常.
4) 去除933b5fc092f67cd4f7bdde31da20b2f211a071b8和2f554490fcd189fd7a49d5dac95742a8e89b43d0两次提交内容,测试功能正常.

【硬件信息】
台式机: DELL optiplex 3050
网卡: RTL8168集成网卡 + RTL8161独立网卡

【软件信息】
1） OS版本及分支：openEuler-20.03-LTS-SP3
2) openEuler-latest系统信息:
openeulerversion=openEuler-20.03-LTS-SP3
compiletime=2022-01-29-12-01-40
gccversion=7.3.0-20211227.44.oe1
kernelversion=4.19.90-2201.4.0.0135.oe1
openjdkversion=1.8.0.312.b07-10.oe1
3) 内核版本: 4.19.90-2202.3.0.0138.oe1.x86_64

【问题复现步骤】
1、配置系统网络为dhcp方式.
2、执行systemctl suspend命令让系统休眠.
3、系统休眠成功后唤醒系统.
4、ifconfig查看系统ip，系统一直获取不到ip地址.
出现概率：20% (使用DELL optiplex 3050集成网卡概率低点,使用8168独立网卡概率较高，可达50%)
补充: 故障时,如果系统使用的是静态ip地址，则系统无法ping通外部,外部也没法ping通内部.

【预期结果】
待机唤醒后网络正常

【实际结果】
概率性的网络不正常

【附件信息】

1. 网卡pci信息
   #lspci -v
   01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
   Subsystem: Dell Device 07a3
   Flags: bus master, fast devsel, latency 0, IRQ 16
   I/O ports at e000 [size=256]
   Memory at f7104000 (64-bit, non-prefetchable) [size=4K]
   Memory at f7100000 (64-bit, non-prefetchable) [size=16K]
   Capabilities: [40] Power Management version 3
   Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
   Capabilities: [70] Express Endpoint, MSI 01
   Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
   Capabilities: [100] Advanced Error Reporting
   Capabilities: [140] Virtual Channel
   Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
   Capabilities: [170] Latency Tolerance Reporting
   Capabilities: [178] L1 PM Substates
   Kernel driver in use: r8169
   Kernel modules: r8169

02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. Device 8161 (rev 15)
Subsystem: Realtek Semiconductor Co., Ltd. Device 8168
Flags: bus master, fast devsel, latency 0, IRQ 17
I/O ports at d000 [size=256]
Memory at f7004000 (64-bit, non-prefetchable) [size=4K]
Memory at f7000000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Endpoint, MSI 01
Capabilities: [b0] MSI-X: Enable+ Count=4 Masked-
Capabilities: [d0] Vital Product Data
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 01-00-00-00-68-4c-e0-00
Capabilities: [170] Latency Tolerance Reporting
Capabilities: [178] L1 PM Substates
Kernel driver in use: r8169
Kernel modules: r8169

2）网卡id信息
#lspci -n
01:00.0 0200: 10ec:8168 (rev 15)
02:00.0 0200: 10ec:8161 (rev 15)

【目前为止的定位信息】
去除933b5fc092f67cd4f7bdde31da20b2f211a071b8和2f554490fcd189fd7a49d5dac95742a8e89b43d0两次提交内容,测试功能正常.

测试步骤如下:

1. 下载最新发布的内核代码4.19.90-2202.4.0.tar.gz.
   https://toscode.gitee.com/openeuler/kernel/repository/blazearchive/4.19.90-2202.4.0.tar.gz?Expires=1645754469&Signature=vA3Dj9JXBEmQ88b%2B4AHCAuR30eFV%2FN2gwAkx6EutjKA%3D

2. 使用系统版本对应的配置编译内核
   #cp /boot/config-4.19.90-2202.3.0.0138.oe1.x86_64 .config
   #make -j8
   #make -j8 modules_install
   #cp arch/x86/boot/bzImage /boot/vmlinuz-openEuler-4.19.90+
   #dracut -f /boot/initramfs-openEuler-4.19.90+.img --kver 4.19.90+

3. 使用vmlinuz-openEuler-4.19.90+与initramfs-openEuler-4.19.90+.img引导系统进行测试.
   测试结果: 故障稳定复现

4. 移除补丁:

1. 933b5fc092f67cd4f7bdde31da20b2f211a071b8
   diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
   index e561ef1..6019e0a 100644
   --- a/drivers/net/phy/phy.c
   +++ b/drivers/net/phy/phy.c
   @@ -861,6 +861,8 @@ void phy_stop(struct phy_device *phydev)
   out_unlock:
   mutex_unlock(&phydev->lock);

+ phy_state_machine(&phydev->state_queue.work);
+
/* Cannot call flush_scheduled_work() here as desired because
* of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
* will not reenable interrupts.

2. 2f554490fcd189fd7a49d5dac95742a8e89b43d0
   diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
   index 6019e0a..51e40a9 100644
   --- a/drivers/net/phy/phy.c
   +++ b/drivers/net/phy/phy.c
   @@ -862,6 +862,7 @@ void phy_stop(struct phy_device *phydev)
   mutex_unlock(&phydev->lock);

    phy_state_machine(&phydev->state_queue.work);
   

+ phy_stop_machine(phydev);

    /* Cannot call flush_scheduled_work() here as desired because
     * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index a64a624..1117355 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -825,8 +825,6 @@ void phy_disconnect(struct phy_device *phydev)
if (phydev->irq > 0)
phy_stop_interrupts(phydev);

- phy_stop_machine(phydev);
-
phydev->adjust_link = NULL;

    phy_detach(phydev);

5. 移除后的diff
   diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
   index 51e40a91d..e561ef1e8 100644
   --- a/drivers/net/phy/phy.c
   +++ b/drivers/net/phy/phy.c
   @@ -861,9 +861,6 @@ void phy_stop(struct phy_device *phydev)
   out_unlock:
   mutex_unlock(&phydev->lock);

- phy_state_machine(&phydev->state_queue.work);
- phy_stop_machine(phydev);
-
/* Cannot call flush_scheduled_work() here as desired because
* of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
* will not reenable interrupts.
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 111735531..a64a62409 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -825,6 +825,8 @@ void phy_disconnect(struct phy_device *phydev)
if (phydev->irq > 0)
phy_stop_interrupts(phydev);

+ phy_stop_machine(phydev);
+
phydev->adjust_link = NULL;

    phy_detach(phydev);

6. 编译后测试网络功能正常.

7. 补充信息
   使用之前系统版本的内核及kernel org v4.19.230版本测试网络功能正常,它们都没有包含上面2个提交内容.