[src/trunk]: src/sys/dev/pci This was able to crash my new alpha consistently...

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

details:   https://anonhg.NetBSD.org/src/rev/e1333645f2c0
branches:  trunk
changeset: 511654:e1333645f2c0
user:      elric <elric%NetBSD.org@localhost>
date:      Sun Jun 24 01:11:08 2001 +0000

description:
This was able to crash my new alpha consistently when I started X.

diffstat:

 sys/dev/pci/tga.c |  9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

diffs (23 lines):

diff -r 31426ef1bbb8 -r e1333645f2c0 sys/dev/pci/tga.c
--- a/sys/dev/pci/tga.c Sun Jun 24 01:06:02 2001 +0000
+++ b/sys/dev/pci/tga.c Sun Jun 24 01:11:08 2001 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tga.c,v 1.31 2001/02/11 19:34:58 nathanw Exp $ */
+/* $NetBSD: tga.c,v 1.32 2001/06/24 01:11:08 elric Exp $ */
 
 /*
  * Copyright (c) 1995, 1996 Carnegie-Mellon University.
@@ -604,8 +604,11 @@
                        return 0;
                }
        }
-       dc->dc_ramdac_intr(dcrc);
-       dc->dc_ramdac_intr = NULL;
+       /* if we have something to do, do it */
+       if (dc->dc_ramdac_intr) {
+               dc->dc_ramdac_intr(dcrc);
+               dc->dc_ramdac_intr = NULL;
+       }
        TGAWREG(dc, TGA_REG_SISR, 0x00000001);
        TGAREGWB(dc, TGA_REG_SISR, 1);
        return (1);