Tool/software: Linux
Hi All,
Does any one know the root cause of RNDIS host probe failure as below?
The log shows error -110 which is ETIMEDOUT. The possibility of this issue is around 2% during a continuous reboot test.
Jan 31 00:01:31 ubuntu-arm kernel: [ 10.268591] cdc_acm 2-1:1.2: ttyACM0: USB ACM device Jan 31 00:01:31 ubuntu-arm kernel: [ 10.286122] usbcore: registered new interface driver cdc_acm Jan 31 00:01:31 ubuntu-arm kernel: [ 10.286147] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters Jan 31 00:01:31 ubuntu-arm kernel: [ 10.296177] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.323928] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.353893] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.383910] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.413914] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.443907] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.473898] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.503965] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.533912] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.563954] rndis_host 2-1:1.0: rndis media connect Jan 31 00:01:31 ubuntu-arm kernel: [ 10.593721] rndis_host 2-1:1.0: RNDIS_MSG_QUERY(0x01010101) failed, -110 Jan 31 00:01:31 ubuntu-arm kernel: [ 10.605622] rndis_host 2-1:1.0: rndis get ethaddr, -110 Jan 31 00:01:31 ubuntu-arm kernel: [ 10.641589] rndis_host: probe of 2-1:1.0 failed with error -110 Jan 31 00:01:31 ubuntu-arm kernel: [ 10.653730] usbcore: registered new interface driver rndis_host
I find it can be recovered by reset modem. In other words, the connection will be OK after reloading RNDIS driver.
It looks like a timing issue between USB device (modem card) & RNDIS host?
Best regards,
Charles
