drm/panel: panasonic-vvx10f034n00: Fix wuxga_nt_panel_disable() return value

Return value for mipi_dsi_shutdown_peripheral() is unchecked.
Check it and return any errors if they come up. Even if
mipi_dsi_shutdown_peripheral() fails, continue attempting to
disable.

Cc: Philippe Cornu <philippe.cornu@st.com>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180116222217.240939-1-seanpaul@chromium.org

diff --git a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
index 7f915f706fa641c165881d1113368e3f2a461ff8..91dc5a6b14f9c773abb4a0faf49aeb63ce43a5fe 100644 (file)
--- a/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
+++ b/drivers/gpu/drm/panel/panel-panasonic-vvx10f034n00.c
@@ -72,11 +72,12 @@ static int wuxga_nt_panel_on(struct wuxga_nt_panel *wuxga_nt)
 static int wuxga_nt_panel_disable(struct drm_panel *panel)
 {
        struct wuxga_nt_panel *wuxga_nt = to_wuxga_nt_panel(panel);
+       int ret;
 
        if (!wuxga_nt->enabled)
                return 0;
 
-       mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
+       ret = mipi_dsi_shutdown_peripheral(wuxga_nt->dsi);
 
        if (wuxga_nt->backlight) {
                wuxga_nt->backlight->props.power = FB_BLANK_POWERDOWN;
@@ -86,7 +87,7 @@ static int wuxga_nt_panel_disable(struct drm_panel *panel)
 
        wuxga_nt->enabled = false;
 
-       return 0;
+       return ret;
 }
 
 static int wuxga_nt_panel_unprepare(struct drm_panel *panel)