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Date: Mon, 6 Nov 2006 20:40:31 GMT
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To: freebsd-bugs@FreeBSD.org
From: Helmut Schellong <var@schellong.biz>
Cc: 
Subject: Re: kern/105169: [panic] cp hangs on copy to a compact flash card
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The following reply was made to PR kern/105169; it has been noted by GNATS.

From: Helmut Schellong <var@schellong.biz>
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: kern/105169: [panic] cp hangs on copy to a compact flash card
Date: Mon, 06 Nov 2006 21:23:56 +0100

 I recommend to remove the device ehci from kernel.
 
 ehci crashes randomly and blocks the system in various ways.
 Sometimes followed by kernel panic, sometimes without panic.
 
 One time the file BETA3 .iso was copied succesfully.
 The transfer rate was about 2.5 MB/s, not the speed of the flash card (18MB/s).
 
 At further tests the copied size was ~50 MB, of the BETA3 .iso (~415 MB).
 Then crash again:
 
 umass0: BBB reset failed, TIMEOUT
 umass0: BBB bulk-in clear stall failed, TIMEOUT
 umass0: BBB bulk-out clear stall failed, TIMEOUT
 umass0: BBB reset failed, TIMEOUT
 umass0: BBB bulk-in clear stall failed, TIMEOUT
 umass0: BBB bulk-out clear stall failed, TIMEOUT
 umass0: BBB reset failed, TIMEOUT
 umass0: BBB bulk-in clear stall failed, TIMEOUT
 umass0: BBB bulk-out clear stall failed, TIMEOUT
 ...
 
 I have solved this problem by building a kernel
 without device ehci.
 
 Sandisk offers CF cards ExtremeIV with 40 MB/s ...
 uhci runs with 1 MB/s only, but it works fine.