kern/53528: wm0 device timeout in NetBSD 5.1

[aravind.ss1094%gmail.com@localhost]

>Number:         53528
>Category:       kern
>Synopsis:       wm0 device timeout in NetBSD 5.1
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Aug 16 11:50:00 +0000 2018
>Originator:     Aravind Mani
>Release:        NetBSD 5.1
>Organization:
Dell
>Environment:
wm0: device timeout (txfree 4095 txsfree 63 txnext 140)
wm0: device timeout (txfree 4095 txsfree 63 txnext 140)
wm0: device timeout (txfree 4095 txsfree 63 txnext 140)
>Description:
We use WM_T_I354 chip type.When we reload continuously,we could able to observe device timeout issue.
wm_init(),wm_reset() doesn't help to recover from problem state.The only way to recover is to reload the switch.
Is there any errata/fix present for this issue?
What is the trigger/root cause for the device timeout?.

>How-To-Repeat:
Reload the switch continuously and run with NetBSD 5.1
>Fix: