Opened 3 years ago
Last modified 3 years ago
#18673 new defect
comgt/chat not working with /dev/cdc-wdm0 only on brcm47xx
| Reported by: | anonymous | Owned by: | developers |
|---|---|---|---|
| Priority: | normal | Milestone: | Chaos Calmer 15.05 |
| Component: | kernel | Version: | Trunk |
| Keywords: | BRCM47XX HUAWEI_CDC_NCM NCM COMGT CHAT | Cc: |
Description
After switch to kernel 3.14, the new NCM and huawei_cdc_ncm driver, which exports the "/dev/cdc-wdm0" command-channel is not working correctly on brcm47xx-platforms.
This is true for kernel 3.10+huawei-patches, 3.14 and 3.18
This not a Huawei E327x-only problem, Sierra and other ncm devices are affected, too!
The command-channel is perfect working on ar7xx and other platforms since kernel 3.10
Something (old) must be different between this platforms, eventualy an alignment problem in the ncm/huawei-driver or a combination with comgt/chat.
Trying to communicate with minicom and "echo" to the device is working. So it looks like the RX-functions are not working.
Attachments (0)
Change History (2)
comment:1 Changed 3 years ago by anonymous
comment:2 Changed 3 years ago by malaakso
Known problem. Work is still in progress with the whole NCM support:
https://lists.openwrt.org/pipermail/openwrt-devel/2014-December/030273.html
stty: /dev/cdc-wdm0: Inappropriate ioctl for device
is the usual error on brcm47xx