[src/trunk]: src/sys/arch/sparc64/dev Sync with sparc/dev/fd.c:1.155.

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

details:   https://anonhg.NetBSD.org/src/rev/1b39dde7310e
branches:  trunk
changeset: 801836:1b39dde7310e
user:      jnemeth <jnemeth%NetBSD.org@localhost>
date:      Tue Aug 19 18:20:51 2014 +0000

description:
Sync with sparc/dev/fd.c:1.155.

Fix panic() on opening fd(4), caused by a wrong pointer passed to memset().

I'm not sure why this 18 year old bug didn't cause problem before
(at least my old 5.99.23 kernel worked), but probably it's triggered
by new gcc 4.8 which might do more aggressive memory allocation.
The problem is found by Nobuyoshi Sato on trying eject(1) against fd(4).

Should be pulled up to netbsd-7.

diffstat:

 sys/arch/sparc64/dev/fdc.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (27 lines):

diff -r d7df4c105be6 -r 1b39dde7310e sys/arch/sparc64/dev/fdc.c
--- a/sys/arch/sparc64/dev/fdc.c        Tue Aug 19 16:18:15 2014 +0000
+++ b/sys/arch/sparc64/dev/fdc.c        Tue Aug 19 18:20:51 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fdc.c,v 1.41 2014/07/25 08:10:35 dholland Exp $        */
+/*     $NetBSD: fdc.c,v 1.42 2014/08/19 18:20:51 jnemeth Exp $ */
 
 /*-
  * Copyright (c) 2000 The NetBSD Foundation, Inc.
@@ -101,7 +101,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: fdc.c,v 1.41 2014/07/25 08:10:35 dholland Exp $");
+__KERNEL_RCSID(0, "$NetBSD: fdc.c,v 1.42 2014/08/19 18:20:51 jnemeth Exp $");
 
 #include "opt_ddb.h"
 #include "opt_md.h"
@@ -2430,7 +2430,7 @@
        struct cpu_disklabel *clp = fd->sc_dk.dk_cpulabel;
 
        memset(lp, 0, sizeof(struct disklabel));
-       memset(lp, 0, sizeof(struct cpu_disklabel));
+       memset(clp, 0, sizeof(struct cpu_disklabel));
 
        lp->d_type = DTYPE_FLOPPY;
        lp->d_secsize = FD_BSIZE(fd);