svn commit: r239243 - head/sys/boot/i386/libi386

[Dimitry Andric]

Author: dim
Date: Mon Aug 13 21:04:01 2012
New Revision: 239243
URL: http://svn.freebsd.org/changeset/base/239243

Log:
  After r239066, reinitialize v86.ctl and v86.addr for int 13 EDD probing
  in sys/boot/i386/libi386/biosdisk.c.  Otherwise, when DISK_DEBUG is
  enabled, the DEBUG() macros will clobber those fields, and cause the
  probing to always fail mysteriously when debugging is enabled.

Modified:
  head/sys/boot/i386/libi386/biosdisk.c

Modified: head/sys/boot/i386/libi386/biosdisk.c
==============================================================================
--- head/sys/boot/i386/libi386/biosdisk.c	Mon Aug 13 19:14:45 2012	(r239242)
+++ head/sys/boot/i386/libi386/biosdisk.c	Mon Aug 13 21:04:01 2012	(r239243)
@@ -215,6 +215,8 @@ bd_int13probe(struct bdinfo *bd)
 	    bd->bd_hds, bd->bd_sec);
 
 	/* Determine if we can use EDD with this device. */
+	v86.ctl = V86_FLAGS;
+	v86.addr = 0x13;
 	v86.eax = 0x4100;
 	v86.edx = bd->bd_unit;
 	v86.ebx = 0x55aa;