From owner-cvs-sys  Sun Mar 23 17:46:18 1997
Return-Path: <owner-cvs-sys>
Received: (from root@localhost)
          by freefall.freebsd.org (8.8.5/8.8.5) id RAA17516
          for cvs-sys-outgoing; Sun, 23 Mar 1997 17:46:18 -0800 (PST)
Received: (from gibbs@localhost)
          by freefall.freebsd.org (8.8.5/8.8.5) id RAA17509;
          Sun, 23 Mar 1997 17:46:17 -0800 (PST)
Date: Sun, 23 Mar 1997 17:46:17 -0800 (PST)
From: "Justin T. Gibbs" <gibbs>
Message-Id: <199703240146.RAA17509@freefall.freebsd.org>
To: CVS-committers, cvs-all, cvs-sys
Subject: cvs commit:  src/sys/scsi scsi_base.c
Sender: owner-cvs-sys@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk

gibbs       97/03/23 17:46:16

  Modified:    sys/scsi  scsi_base.c
  Log:
  free_xs must be called at splbio().  This is usually the case since the main
  caller is scsi_done which the controller interrupt handlers call.  In the
  case of a non-buffer based transaction, the xs structure is freed by the
  process that initiated the transfer in scsi_scsi_cmd.  In this case, an
  explicit splbio/splx pair around the call to free_xs is required.  Without
  the splbio protection, the xs free list could be corrupted, and the type
  driver's start routine might run without spl protection.
  
  Submitted by:	Tor Egge <Tor.Egge@idt.ntnu.no>
  Obtained from: PR kern/2891
  
  Revision  Changes    Path
  1.47      +3 -1      src/sys/scsi/scsi_base.c