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Re: kern/51524: USB vs. serial problems

The following reply was made to PR kern/51524; it has been noted by GNATS.

From: "John D. Baker" <>
Subject: Re: kern/51524: USB vs. serial problems
Date: Sun, 2 Oct 2016 17:10:39 -0500 (CDT)

 On Sun, 2 Oct 2016 20:45:00 +0000 (UTC), Thomas Klausner <>
 > 4 hours later I saw the following in the kernel log:
 >ehci_sync_hc: cv_timedwait() = 35
 Curious.  This exact same error has been observed with USB network
 devices, specifically, urtw(4) on evbmips-mips64el (Lemote Yeeloong,
 LOONGSON kernel).  See the partial thread "Shutdown hangs if umass(4)
 media still mounted" here:
 The same message originally appeared with umass(4) media mounted at
 shutdown, but that has not been seen for a while.  If umass(4) media
 are in use when a urtw(4) interface is associated with an access point,
 the message will appear and the system will be hung.
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