[src/trunk]: src/sys/external/bsd/drm2/dist/drm/i915 Cast uint8_t to uint32_t...

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

details:   https://anonhg.NetBSD.org/src/rev/4cea42665893
branches:  trunk
changeset: 343614:4cea42665893
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Wed Feb 17 00:01:23 2016 +0000

description:
Cast uint8_t to uint32_t before shifting left by 24.

Otherwise this is undefined behaviour unless int is 32-bit and the
uint8_t value happens to be <=127.

diffstat:

 sys/external/bsd/drm2/dist/drm/i915/intel_pm.c |  4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diffs (14 lines):

diff -r 4e97af58a51b -r 4cea42665893 sys/external/bsd/drm2/dist/drm/i915/intel_pm.c
--- a/sys/external/bsd/drm2/dist/drm/i915/intel_pm.c    Tue Feb 16 23:07:58 2016 +0000
+++ b/sys/external/bsd/drm2/dist/drm/i915/intel_pm.c    Wed Feb 17 00:01:23 2016 +0000
@@ -4487,8 +4487,8 @@
        pxw[15] = 0;
 
        for (i = 0; i < 4; i++) {
-               u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
-                       (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
+               u32 val = ((u32)pxw[i*4] << 24) | ((u32)pxw[(i*4)+1] << 16) |
+                       ((u32)pxw[(i*4)+2] << 8) | ((u32)pxw[(i*4)+3]);
                I915_WRITE(PXW + (i * 4), val);
        }