eth0 tx fail for bsc9132

zhengguangzhe — Fri, 04 Jan 2019 07:01:42 GMT

hello

Recently, we encountered an abnormal problem with the ethernet eth0.

it can't send packets but can receive packets. We analyzed and found：

1、The interrupt eth0_g_tx has no changed；

2、Transmit status register (eTSECx_TSTAT) always is 00 00 ff 00
3、kernel code sch_generic.c-->dev_watchdog Masked timeout processing logic

if (some_queue_timedout) {
               char drivername[64];
               WARN_ONCE(1, KERN_INFO "NETDEV WATCHDOG: %s (%s): transmit queue %u timed out\n",
                       dev->name, netdev_drivername(dev, drivername, 64), i);
                /* dev->netdev_ops->ndo_tx_timeout(dev); */
           }

My questions:

1、Under what conditions will this problem occur?

2、Is the timeout processing to solve this problem?

3、Is the chip itself defective?

Processor Expert Softwareのトピックeth0 tx fail for bsc9132

eth0 tx fail for bsc9132