FS#684 - bug in kmod-can #5721
Comments
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yousong: Please check if the usb_8dev kmod was correctly inserted. The following info can be helpful
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marconi: This has nothing to do with the usb_8dev hardware (the problem exists on the virtual interface : vcan). FYI, this is still a problem on Reboot (17.01.1, r3316-7eb58cf109) :
root@oo0:/# opkg install kmod-can-vcan
Installing kmod-can-vcan (4.4.61-1) to root...
Downloading http://downloads.lede-project.org/releases/17.01.1/targets/ar71xx/generic/packages/kmod-can-vcan_4.4.61-1_mips_24kc.ipk
Installing kmod-can (4.4.61-1) to root...
Downloading http://downloads.lede-project.org/releases/17.01.1/targets/ar71xx/generic/packages/kmod-can_4.4.61-1_mips_24kc.ipk
Configuring kmod-can.
[ 77.257909] can: controller area network core (rev 20120528 abi 9)
[ 77.262785] NET: Registered protocol family 29
[ 77.279625] CAN device driver interface
can-dev is already loaded
Configuring kmod-can-vcan.
[ 77.398133] vcan: Virtual CAN interface driver
Collected errors:
* pkg_run_script: package "kmod-can" postinst script returned status 255.
* opkg_configure: kmod-can.postinst returned 255.
root@oo0:/# ip link add dev vcan0 type vcan
root@oo0:/# ip l
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: mtu 1500 qdisc fq_codel state DOWN qlen 1000
link/ether 40:a3:6b:c1:08:f9 brd ff:ff:ff:ff:ff:ff
4: wlan0: mtu 1500 qdisc noqueue state UP qlen 1000
link/ether 40:a3:6b:c1:08:fa brd ff:ff:ff:ff:ff:ff
5: vcan0: mtu 16 qdisc noop state DOWN qlen 1
link/[280]
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yousong: Hi, this is indeed caused by a flaw of modprobe within 17.01. The issue was already fixed in master branch but did not get backported yet. As for the link/[280] issue, it was probably caused by the fact that busybox ip utility does not recognise the link type. Installing ip-full should solve the it. This is a relatively minor one. To temporarily get around the first issue, you can edit /lib/functions.sh and insert a call to "true" at the end of "insert_modules" function. This is ugly hack of course... I will propose in the mailing list to at least add a patch for ubox utility of 17.01 |
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marconi: Awesome ! I tried your "get around / ugly hack" and it seems to work : I installed kmod-can-usb-8dev and plugged the device in and seems to work : I'll test more when I can get access to a CANbus (modern cars and boats use CANbus). I also installed "ip-full" and the "link/[280]" output becomes "link/can" Thanks ! |
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yousong: I just check with mips_24kc, the new fixed ubox package is now available. "opkg install ubox" should bring it up to date. |
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marconi: That works. I did "opkg upgrade ubox" and then "opkg install kmod-can" and there was no error. FYI, "opkg install kmod-can-usb-8dev" installs the CANbus device driver and plugging the device in shows "usb_8dev 1-1:1.0 can0: firmware: 1.7, hardware: 1.0" in dmesg. Thanks! |
marconi:
When I installed "kmod-can-usb-8dev", I got an error from "kmod-can" :
root@ap121u:~# opkg install kmod-can-usb-8dev- pkg_run_script: package "kmod-can" postinst script returned status 255.
- opkg_configure: kmod-can.postinst returned 255.
Installing kmod-can-usb-8dev (4.4.50-1) to root...
Downloading http://downloads.lede-project.org/releases/17.01.0/targets/ar71xx/generic/packages/kmod-can-usb-8dev_4.4.50-1_mips_24kc.ipk
Installing kmod-can (4.4.50-1) to root...
Downloading http://downloads.lede-project.org/releases/17.01.0/targets/ar71xx/generic/packages/kmod-can_4.4.50-1_mips_24kc.ipk
Configuring kmod-can.
can-dev is already loaded
Configuring kmod-can-usb-8dev.
Collected errors:
When I plugged in the device ( http://www.8devices.com/products/usb2can ), then "ip l" didn't look right :
7: can0: mtu 16 qdisc noop state DOWN qlen 10 link/[280]I tried it on an "Onion Omega" with LEDE 17.01.0 , I got the same symptom as the AP121U.
When I tried it on an "Onion Omega" with "CHAOS CALMER (15.05.1)", it worked OK.
It's even broken with the "virtual CAN' device : kmod-can-vcan
Supply the following if possible:
Both "Alfa AP121U" and "Onion Omega" showed the problem
LEDE Reboot (17.01.0, r3205-59508e3)
install kmod-vcan :
opkg install kmod-can-vcan
notice kmod-can error message : "returned 255"
create virtual CAN interface :
ip link add dev vcan0 type vcan
print link info :
ip l
notice "link/[280]" (instead of "link/can"
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