drm/exynos: fix checks for valid mixer window

Valid values for mixer window are from 0 to MIXER_WIN_NR-1 inclusive.
Arrays in structures (e.g. mixer_context.win_data) have size of
MIXER_WIN_NR so checks for wrong mixer window must be greater-equal.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Hyunhee Kim <hyunhee.kim@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_hdmi.c b/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
index 437fb94..b9b2726 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_hdmi.c
@@ -344,7 +344,7 @@ static void drm_mixer_commit(struct device *subdrv_dev, int zpos)
 
        DRM_DEBUG_KMS("%s\n", __FILE__);
 
-       if (win < 0 || win > MIXER_WIN_NR) {
+       if (win < 0 || win >= MIXER_WIN_NR) {
                DRM_ERROR("mixer window[%d] is wrong\n", win);
                return;
        }
@@ -362,7 +362,7 @@ static void drm_mixer_disable(struct device *subdrv_dev, int zpos)
 
        DRM_DEBUG_KMS("%s\n", __FILE__);
 
-       if (win < 0 || win > MIXER_WIN_NR) {
+       if (win < 0 || win >= MIXER_WIN_NR) {
                DRM_ERROR("mixer window[%d] is wrong\n", win);
                return;
        }

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 7c197d3..3658e07 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -742,7 +742,7 @@ static void mixer_win_mode_set(void *ctx,
        if (win == DEFAULT_ZPOS)
                win = MIXER_DEFAULT_WIN;
 
-       if (win < 0 || win > MIXER_WIN_NR) {
+       if (win < 0 || win >= MIXER_WIN_NR) {
                DRM_ERROR("mixer window[%d] is wrong\n", win);
                return;
        }