ports/161740: panic occurs when execute kldunload(ports multimedia/ptx-kmod).

[YOSHIHARU ITO]

>Number:         161740
>Category:       ports
>Synopsis:       panic occurs when execute kldunload(ports multimedia/ptx-kmod).
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 17 13:40:05 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     YOSHIHARU ITO
>Release:        8.2-RELEASE/amd64
>Organization:
>Environment:
FreeBSD fusion 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Thu Feb 17 02:41:51 UTC 2011     root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
>Description:
The module file ptx.ko provided by ports multimedia/ptx-kmod contains
software bug.

bus_dmamem_free() has incorrect arguments, panic occurs when execute kldunload.

>How-To-Repeat:
1. install ports multimedia/ptx-kmod
2. kldload ptx.ko
3. kldunload ptx.ko

>Fix:
Please refer attached patch. See also the comments on the following pages.

http://d.hatena.ne.jp/bsdaemon/20110326

This patch contains other small improvement.


>Release-Note:
>Audit-Trail:
>Unformatted: