Hi，community:
Our company has customized a motherboard for imx8mq, running yocto system, there are two usb3.0 interfaces on the motherboard, which are connected by two usb3.0hosts on the cpu, respectively connected to two usb3.0 interface cameras. At the same time, two cameras are taken to take the image stream, and the operation is normal at the beginning. After a period of time, the following error is printed:
[ 1163.760957] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.763187] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.765412] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.767643] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.769866] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.772090] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.774313] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.776538] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.778765] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.780990] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.783216] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.785440] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.787663] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[1163.789894] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.792118] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.794342] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.796564] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.798786] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.801017] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[1163.803243] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[1163.805466] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[1163.807692] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[1163.809914] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.812142] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[ 1163.814363] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
[1164.500502] systemd-journald[1737]: /dev/kmsg buffer overrun, some messages lost.
[ 1164.514332] xhci-hcd xhci-hcd.0.auto: Ring expansion failed
What is the problem with this?
