[src/jdolecek-ncq]: src/sys/dev/ata add debug printf if we fail to obtain xfe...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b999741bd69f
branches:  jdolecek-ncq
changeset: 352689:b999741bd69f
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Fri Jun 23 23:45:09 2017 +0000

description:
add debug printf if we fail to obtain xfer in wddump()

diffstat:

 sys/dev/ata/wd.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (30 lines):

diff -r 802c5cb610d8 -r b999741bd69f sys/dev/ata/wd.c
--- a/sys/dev/ata/wd.c  Fri Jun 23 22:11:13 2017 +0000
+++ b/sys/dev/ata/wd.c  Fri Jun 23 23:45:09 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: wd.c,v 1.428.2.21 2017/06/23 22:11:13 jdolecek Exp $ */
+/*     $NetBSD: wd.c,v 1.428.2.22 2017/06/23 23:45:09 jdolecek Exp $ */
 
 /*
  * Copyright (c) 1998, 2001 Manuel Bouyer.  All rights reserved.
@@ -54,7 +54,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: wd.c,v 1.428.2.21 2017/06/23 22:11:13 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: wd.c,v 1.428.2.22 2017/06/23 23:45:09 jdolecek Exp $");
 
 #include "opt_ata.h"
 
@@ -1654,8 +1654,10 @@
        }
 
        xfer = ata_get_xfer_ext(wd->drvp->chnl_softc, false, 0);
-       if (xfer == NULL)
+       if (xfer == NULL) {
+               printf("%s: no xfer\n", __func__);
                return EAGAIN;
+       }
 
        xfer->c_bio.blkno = blkno;
        xfer->c_bio.flags = ATA_POLL;