From owner-freebsd-bugs  Tue Oct  3  2:40: 5 2000
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Date: Tue,  3 Oct 2000 02:30:09 -0700 (PDT)
From: razuwaev@relex.ru
To: freebsd-gnats-submit@FreeBSD.org
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Subject: kern/21723: sa device driver bug
Sender: owner-freebsd-bugs@FreeBSD.ORG
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>Number:         21723
>Category:       kern
>Synopsis:       sa device driver bug
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Oct 03 02:40:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Andrew
>Release:        4.1-STABLE
>Organization:
Relex, Ltd.
>Environment:
FreeBSD p227.relex.ru 4.1-STABLE 
FreeBSD 4.1-STABLE #12: Mon Sep 25 15:50:49 MSD 2000
amass@p227.relex.ru:/usr/src/sys/compile/KERNEL-A  i386
>Description:
f=open("/dev/nrsa0",O_RDWR);
write(f, buf, size);
ioctl(fd, MTIOCRDSPOS, &offs); 
This sequence hangs up the task on waiting disk operation.
Driver waits for awake on sys/cam/cam_periph.c : cam_periph_getccb() on
tsleep(&periph->ccb_list, PRIBIO, "cgticb", 0);

>How-To-Repeat:
f=open("/dev/nrsa0",O_RDWR);
write(f, buf, size);
ioctl(fd, MTIOCRDSPOS, &offs); 

>Fix:
This problem is fixed by replace :
ccb = cam_periph_getccb(periph, 1); 
if (softc->flags & SA_FLAG_TAPE_WRITTEN) {
	error = sawritefilemarks(periph, 0, 0);
	if (error && error != EACCES)
		return (error);
}
to :
if (softc->flags & SA_FLAG_TAPE_WRITTEN) {
	error = sawritefilemarks(periph, 0, 0);
	if (error && error != EACCES)
		return (error);
}
ccb = cam_periph_getccb(periph, 1);



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


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