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nb/i945,gm45,x4x/gma.c: fix unsigned arithmetics

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This issue was found by Coverity Scan, CID 1364118.

Change-Id: Iba3c0f4f952729d9e0987d928b63ef8b8fe8841e
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/16992
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins)
This commit is contained in:
Arthur Heymans
2016-10-12 01:04:28 +02:00
committed by Martin Roth
parent 063cd5f6ee
commit 75f9131453
3 changed files with 8 additions and 4 deletions
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6
src/northbridge/intel/gm45/gma.c
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@@ -171,7 +171,8 @@ static void gma_init_lvds(const struct northbridge_intel_gm45_config *info,
u32 p = candp1 * pixel_p2;
u32 vco = DIV_ROUND_CLOSEST(BASE_FREQUENCY * m, candn + 2);
u32 dot = DIV_ROUND_CLOSEST(vco, p);
u32 this_err = ABS(dot - target_frequency);
u32 this_err = MAX(dot, target_frequency) -
MIN(dot, target_frequency);
if (this_err < smallest_err) {
smallest_err = this_err;
pixel_n = candn;
@@ -477,7 +478,8 @@ static void gma_init_vga(const struct northbridge_intel_gm45_config *info,
u32 p = candp1 * pixel_p2;
u32 vco = DIV_ROUND_CLOSEST(BASE_FREQUENCY * m, candn + 2);
u32 dot = DIV_ROUND_CLOSEST(vco, p);
u32 this_err = ABS(dot - target_frequency);
u32 this_err = MAX(dot, target_frequency) -
MIN(dot, target_frequency);
if (this_err < smallest_err) {
smallest_err= this_err;
pixel_n = candn;