Re: kern/50038: udl (DisplayLink GX-DVI_U2B) alignment fault on earmv6hf NETWALKER

[MOCHIDA Shuji <mochid%netside.co.jp@localhost>]

The following reply was made to PR kern/50038; it has been noted by GNATS.

From: MOCHIDA Shuji <mochid%netside.co.jp@localhost>
To: skrll%netbsd.org@localhost
Cc: gnats-bugs%NetBSD.org@localhost, kern-bug-people%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost
Subject: Re: kern/50038: udl (DisplayLink GX-DVI_U2B) alignment fault on
 earmv6hf NETWALKER
Date: Fri, 18 Nov 2016 03:08:11 +0900 (JST)

 > You could try removing BUS_DMA_COHERENT from the bus_dmamem_map call - see diff.
 
 That change seems to cause USB errors. USB ports are unusable.
 
 
   :
 uhub0 at usb0: vendor 0000 DWC2 root hub, class 9/0, rev 2.00/1.00, addr 1
 uhub0: 1 port with 1 removable, self powered
   :
 usbd_new_device: addr=2 bad max packet size=0. adjusting to 64.
 uhub0: device problem, disabling port 1
 usbd_new_device: addr=2 bad max packet size=0. adjusting to 64.
 uhub0: device problem, disabling port 1
 uhub0: port error, restarting port 1
 usbd_new_device: addr=2 bad max packet size=0. adjusting to 64.
 uhub0: device problem, disabling port 1
 uhub0: port error, restarting port 1
 usbd_new_device: addr=2 bad max packet size=0. adjusting to 64.
 uhub0: device problem, disabling port 1
 uhub0: port error, restarting port 1
 usbd_new_device: addr=2 bad max packet size=0. adjusting to 64.
 uhub0: device problem, disabling port 1
 uhub0: port error, restarting port 1
 usbd_new_device: addr=2 bad max packet size=0. adjusting to 64.
 uhub0: device problem, disabling port 1
 uhub0: port error, restarting port 1
 uhub0: port error, giving up port 1
   :
 
 
 -mochid