[src/trunk]: src/sys/dev/sbus kill subyte.

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

details:   https://anonhg.NetBSD.org/src/rev/6b2d83e90868
branches:  trunk
changeset: 811882:6b2d83e90868
user:      christos <christos%NetBSD.org@localhost>
date:      Fri Nov 20 19:09:23 2015 +0000

description:
kill subyte.

diffstat:

 sys/dev/sbus/zx.c |  35 +++++++++++++++++++----------------
 1 files changed, 19 insertions(+), 16 deletions(-)

diffs (64 lines):

diff -r efdf4f5f1337 -r 6b2d83e90868 sys/dev/sbus/zx.c
--- a/sys/dev/sbus/zx.c Fri Nov 20 18:34:17 2015 +0000
+++ b/sys/dev/sbus/zx.c Fri Nov 20 19:09:23 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: zx.c,v 1.39 2012/01/11 16:08:57 macallan Exp $ */
+/*     $NetBSD: zx.c,v 1.40 2015/11/20 19:09:23 christos Exp $ */
 
 /*
  *  Copyright (c) 2002 The NetBSD Foundation, Inc.
@@ -45,7 +45,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: zx.c,v 1.39 2012/01/11 16:08:57 macallan Exp $");
+__KERNEL_RCSID(0, "$NetBSD: zx.c,v 1.40 2015/11/20 19:09:23 christos Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -388,7 +388,7 @@
        struct fbcmap *cm;
        struct fbcursor *cu;
        uint32_t curbits[2][32];
-       int rv, v, count, i;
+       int rv, v, count, i, error;
 
        sc = device_lookup_private(&zx_cd, minor(dev));
 
@@ -537,20 +537,23 @@
                                return (rv);
                }
                if (cu->cmap.red != NULL) {
-                       if (cu->cmap.index > 2 ||
-                           cu->cmap.count > 2 - cu->cmap.index)
-                               return (EINVAL);
-                       for (i = 0; i < cu->cmap.count; i++) {
-                               v = sc->sc_curcmap[i + cu->cmap.index + 0];
-                               if (subyte(&cu->cmap.red[i], v))
-                                       return (EFAULT);
-                               v = sc->sc_curcmap[i + cu->cmap.index + 2];
-                               if (subyte(&cu->cmap.green[i], v))
-                                       return (EFAULT);
-                               v = sc->sc_curcmap[i + cu->cmap.index + 4];
-                               if (subyte(&cu->cmap.blue[i], v))
-                                       return (EFAULT);
+                       uint8_t red[2], green[2], blue[2];
+                       const uint8_t *ccm = sc->sc_curcmap;
+                       cm = &cu->cmap;
+
+                       if (cm->index > 2 || cm->count > 2 - cm->index)
+                               return EINVAL;
+
+                       for (i = 0; i < cm->count; i++) {
+                               red[i] = ccm[i + cm->index + 0];
+                               green[i] = ccm[i + cm->index + 2];
+                               blue[i] = ccm[i + cm->index + 4];
                        }
+
+                       if ((error = copyout(red, cm->red, cm->count)) ||
+                           (error = copyout(green, cm->green, cm->count)) ||
+                           (error = copyout(blue, cm->blue, cm->count)))
+                               return error;
                } else {
                        cu->cmap.index = 0;
                        cu->cmap.count = 2;