[][kernel][common][eth][Fix the ethX transmit timeout issue caused by the NETSYS SER]

[Description]
Fix the ethX transmit timeout issue caused by the NETSYS SER.

In the previous change 9787474, we added a new NETSYS SER design to
prevent resetting GMAC when GMAC is not hung. However, this design
introduced a 'ethX: transmit timed out' issue when the Ethernet port
is not connected to the link partner.
Therefore, we added a check to avoid mistakenly calling
netif_carrier_on().

Without this patch, the kernel will encounter an 'ethX: transmit timed
out' issue after NETSYS SER.

[Release-log]
N/A


Change-Id: I5360d4fa985a2890373c438c8938c50ba05ae0bf
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9821872
1 file changed
tree: 3bc8afb4b545cb611b405002766bb6b6d41f48ed
  1. 21.02/
  2. autobuild/
  3. feed/
  4. master/
  5. scripts/
  6. tools/
  7. .checkpatch.conf
  8. .clang-format
  9. .gitignore
  10. prepare_sdk.sh
  11. Readme.md
Readme.md

Brief introduction for using MediaTek released OpenWrt SDK

1. Build system setup

2. Clone vanilla OpenWrt

Currently two release branches are supported:

  1. 21.02 This is the current in-use branch

    git clone -b openwrt-21.02 https://git.openwrt.org/openwrt/openwrt.git
    
  2. master (will be 24.0x branch later) The next version in development

    git clone https://git.openwrt.org/openwrt/openwrt.git
    

3. Add MediaTek OpenWrt feed

cd openwrt
echo "src-git mtk_openwrt_feed https://git01.mediatek.com/openwrt/feeds/mtk-openwrt-feeds" >> feeds.conf.default
./scripts/feeds update -a
./scripts/feeds install -a

4. Apply MediaTek OpenWrt files and patches

  1. 21.02 branch

    cp -af ./feeds/mtk_openwrt_feed/21.02/files/* .
    cp -af ./feeds/mtk_openwrt_feed/tools .
    for file in $(find ./feeds/mtk_openwrt_feed/21.02/patches-base -name "*.patch" | sort); do patch -f -p1 -i ${file}; done
    for file in $(find ./feeds/mtk_openwrt_feed/21.02/patches-feeds -name "*.patch" | sort); do patch -f -p1 -i ${file}; done
    
  2. master branch

    cp -af ./feeds/mtk_openwrt_feed/master/files/* .
    for file in $(find ./feeds/mtk_openwrt_feed/master/patches-base -name "*.patch" | sort); do patch -f -p1 -i ${file}; done
    

5. Configuration

make menuconfig
  1. 21.02 branch

    Target System -> MediaTek Ralink ARM
    Subtarget -> MT7981 / MT7986 / MT7988
    Target Profile -> select as needed
    
  2. master branch

    Target System -> MediaTek Ralink ARM
    Subtarget -> Filogic 8x0 (MT798x)
    Target Profile -> select as needed
    

6. Build

make V=s -j$(nproc)