Re: linux_sg.c modification for SCSI Test Unit Ready command

[Tracy Di Marco White <netbsd-t%menelos.com@localhost>]

In message <16137.1205684629%menelos.com@localhost>, Tracy Di Marco White 
writes:
>
>I've needed to add emulation for the SCSI Test Unit Ready command
>to my backup server, so I could run Sony's tape diagnostics.
>It's fairly simple, but is it the correct flag to use for that?
>The patch below is what I'm using on my 4.0 backup server.
>
>-Tracy

Once more with -u

Index: linux_sg.c
===================================================================
RCS file: /cvsroot/src/sys/compat/linux/common/linux_sg.c,v
retrieving revision 1.8
diff -u -r1.8 linux_sg.c
--- linux_sg.c  13 Sep 2006 00:51:12 -0000      1.8
+++ linux_sg.c  16 Mar 2008 16:26:12 -0000
@@ -107,11 +107,17 @@
                (void)memset(&req, 0, sizeof(req));
                switch (lreq.dxfer_direction) {
                case SG_DXFER_TO_DEV:
+                       /* e.g. a SCSI WRITE command */
                        req.flags = SCCMD_WRITE;
                        break;
                case SG_DXFER_FROM_DEV:
+                        /* e.g. a SCSI READ command */
                        req.flags = SCCMD_READ;
                        break;
+               case SG_DXFER_NONE:
+                       /* e.g. a SCSI Test Unit Ready command */
+                       req.flags = SCCMD_ESCAPE;
+                       break;
                default:
                        DPRINTF(("unknown direction %d\n",
                                lreq.dxfer_direction));