[src/trunk]: src/sys/fs/msdosfs Correct the bread size of struct fsinfo from ...

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

details:   https://anonhg.NetBSD.org/src/rev/332eb383288d
branches:  trunk
changeset: 330595:332eb383288d
user:      christos <christos%NetBSD.org@localhost>
date:      Tue Jul 15 11:43:54 2014 +0000

description:
Correct the bread size of struct fsinfo from Gerald Lee at DELL dot com

diffstat:

 sys/fs/msdosfs/msdosfs_vfsops.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (35 lines):

diff -r a35ad6e19ccb -r 332eb383288d sys/fs/msdosfs/msdosfs_vfsops.c
--- a/sys/fs/msdosfs/msdosfs_vfsops.c   Tue Jul 15 11:19:08 2014 +0000
+++ b/sys/fs/msdosfs/msdosfs_vfsops.c   Tue Jul 15 11:43:54 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: msdosfs_vfsops.c,v 1.112 2014/07/09 09:00:18 maxv Exp $        */
+/*     $NetBSD: msdosfs_vfsops.c,v 1.113 2014/07/15 11:43:54 christos Exp $    */
 
 /*-
  * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
@@ -48,7 +48,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.112 2014/07/09 09:00:18 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.113 2014/07/15 11:43:54 christos Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_compat_netbsd.h"
@@ -741,6 +741,7 @@
         */
        if (pmp->pm_fsinfo) {
                struct fsinfo *fp;
+               const int rdsz = roundup(sizeof(*fp), pmp->pm_BytesPerSec);
 
                /*
                 * XXX  If the fsinfo block is stored on media with
@@ -748,7 +749,7 @@
                 *      padded at the end or in the middle?
                 */
                if ((error = bread(devvp, de_bn2kb(pmp, pmp->pm_fsinfo),
-                   pmp->pm_BytesPerSec, NOCRED, 0, &bp)) != 0)
+                   rdsz, NOCRED, 0, &bp)) != 0)
                        goto error_exit;
                fp = (struct fsinfo *)bp->b_data;
                if (!memcmp(fp->fsisig1, "RRaA", 4)