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drm/sun4i: tcon: fix check of tcon->panel null pointer

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Since tcon->panel is a pointer returned by of_drm_find_panel() need to
check if it is not NULL, hence a valid pointer.
IS_ERR() instead checks return error values, not NULL pointers.

Substitute "if (!IS_ERR(tcon->panel))" with "if (tcon->panel)".

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181005215951.99003-1-giulio.benetti@micronovasrl.com
This commit is contained in:
Giulio Benetti 2018-10-05 23:59:50 +02:00 committed by Maxime Ripard
parent 84c0851794
commit 548ae867ef
No known key found for this signature in database
GPG key ID: D2B4C094214DAF74
3 changed files with 5 additions and 5 deletions
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4
drivers/gpu/drm/sun4i/sun4i_lvds.c
View file

@ -75,7 +75,7 @@ static void sun4i_lvds_encoder_enable(struct drm_encoder *encoder)
DRM_DEBUG_DRIVER("Enabling LVDS output\n");
if (!IS_ERR(tcon->panel)) {
if (tcon->panel) {
drm_panel_prepare(tcon->panel);
drm_panel_enable(tcon->panel);
}
@ -88,7 +88,7 @@ static void sun4i_lvds_encoder_disable(struct drm_encoder *encoder)
DRM_DEBUG_DRIVER("Disabling LVDS output\n");
if (!IS_ERR(tcon->panel)) {
if (tcon->panel) {
drm_panel_disable(tcon->panel);
drm_panel_unprepare(tcon->panel);
}

4
drivers/gpu/drm/sun4i/sun4i_rgb.c
View file

@ -135,7 +135,7 @@ static void sun4i_rgb_encoder_enable(struct drm_encoder *encoder)
DRM_DEBUG_DRIVER("Enabling RGB output\n");
if (!IS_ERR(tcon->panel)) {
if (tcon->panel) {
drm_panel_prepare(tcon->panel);
drm_panel_enable(tcon->panel);
}
@ -148,7 +148,7 @@ static void sun4i_rgb_encoder_disable(struct drm_encoder *encoder)
DRM_DEBUG_DRIVER("Disabling RGB output\n");
if (!IS_ERR(tcon->panel)) {
if (tcon->panel) {
drm_panel_disable(tcon->panel);
drm_panel_unprepare(tcon->panel);
}

2
drivers/gpu/drm/sun4i/sun4i_tcon.c
View file

@ -555,7 +555,7 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
* Following code is a way to avoid quirks all around TCON
* and DOTCLOCK drivers.
*/
if (!IS_ERR(tcon->panel)) {
if (tcon->panel) {
struct drm_panel *panel = tcon->panel;
struct drm_connector *connector = panel->connector;
struct drm_display_info display_info = connector->display_info;