Andre Valentin <avalen...@marcant.net> writes: > 3) Problems with QMI Interfaces > QMI is used for mobile phones and interact with the qmi_wwan driver in the > kernel. I had transmit issues, > switched the driver back to the 4.14 while still on 5.4. But the same problem > happens again. > Under 4.14 this was not a problem. So it seems 5.4 or the SOC patches somehow > are the root cause. > Here's the kernel message: > > > [ 4199.444191] ------------[ cut here ]------------ > [ 4199.453534] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:447 > dev_watchdog+0x2f8/0x300 > [ 4199.470074] NETDEV WATCHDOG: wwan0 (qmi_wwan): transmit queue 0 timed out
And this is not just an occasional timeout? The driver hangs completely there? I don't think there were many qmi_wwan changes between v4.14 and v5.4, except for device additions and some fixes which mostly have been backported to v4.14-stable. But maybe this is related to your specific modem? Do you have a device ID for that? Do we know that USB is working on v5.4 BTW? The MT7621 device I am using doesn't have any USB ports, so I can't check that myself. Is your modem connected by USB3 or USB2? Any of lsusb -v cat /sys/kernel/debug/usb/devices grep . /sys/bus/usb/devices/*/version will tell. You'll have to match up the latter with the device if you have more than one USB device connected. Bjørn _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel