Re: port-evbarm/54696: Kernel panic in bus_dma.c on Raspberry Pi 3B/3B+

[Jason Thorpe <thorpej%me.com@localhost>]

The following reply was made to PR port-evbarm/54696; it has been noted by GNATS.

From: Jason Thorpe <thorpej%me.com@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: port-evbarm-maintainer%netbsd.org@localhost,
 gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost,
 dhop%nwlink.com@localhost
Subject: Re: port-evbarm/54696: Kernel panic in bus_dma.c on Raspberry Pi
 3B/3B+
Date: Wed, 13 Nov 2019 19:56:02 -0800

 > On Nov 13, 2019, at 1:05 PM, Michael van Elst <mlelstv%serpens.de@localhost> =
 wrote:
 >=20
 > The following reply was made to PR port-evbarm/54696; it has been =
 noted by GNATS.
 >=20
 > From: mlelstv%serpens.de@localhost (Michael van Elst)
 > To: gnats-bugs%netbsd.org@localhost
 > Cc:=20
 > Subject: Re: port-evbarm/54696: Kernel panic in bus_dma.c on Raspberry =
 Pi 3B/3B+
 > Date: Wed, 13 Nov 2019 21:03:51 -0000 (UTC)
 >=20
 > dhop%nwlink.com@localhost writes:
 >=20
 >> [   153.534940] panic: kernel diagnostic assertion "len > 0 && offset =
 + len <=3D map->dm_mapsize" failed: file =
 "/usr/src/sys/arch/arm/arm32/bus_dma.c", line 1058 len 0 offset 0 =
 mapsize 8192
 >=20
 > A zero length transfer. In that case it would be a uaudio (or audio?) =
 bug.
 >=20
 > No idea why that should be aarch64-specific.
 
 We should probably just relax the bus_dma assertion there to be a no-op.
 
 >=20
 >=20
 > --=20
 > --=20
 >                                 Michael van Elst
 > Internet: mlelstv%serpens.de@localhost
 >                                 "A potential Snark may lurk in every =
 tree."
 >=20
 
 -- thorpej