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usb cdc-acm error

Question asked by jjysekm@gmail.com on Oct 3, 2019

Dear NXP Team,

 

We are currently using L4.14.98 release we are observing error relating usb cdc-acm in imx8dx

 

[xhci-cdns3: WARN urb submitted to disabled ep
cdc_acm 1-1:1.2: acm_port_activate - usb_submit_urb(ctrl irq) failed
xhci-cdns3: WARN urb submitted to disabled ep
cdc_acm 1-1:1.2: acm_port_activate - usb_submit_urb(ctrl irq) failed

[..]

cdc_acm 1-1:1.0: failed to set dtr/rts
xhci-cdns3: ERROR unknown endpoint state for ep
cdc_acm 1-1:1.1: urb 2 failed submission with -22
xhci-cdns3: ERROR unknown event type 31
xhci-cdns3: ERROR unknown event type 22
xhci-cdns3: WARN waiting for error on ep to be cleared
cdc_acm 1-1:1.0: failed to set dtr/rts
xhci-cdns3: ERROR unknown endpoint state for ep
cdc_acm 1-1:1.3: acm_start_wb - usb_submit_urb(write bulk) failed: -22
systemd: 20 output lines suppressed due to ratelimiting

Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000008b

 

Why this error is observed?

How to resolve this error?

Outcomes